Question: How many gatherings take place every Sunday at the church that Pascoe St Leger Grenfell donated an acre of land for?

Context paragraphs:
Lectio continua: In Christianity, Lectio continua (Latin for "continuous reading") refers to the practice of reading Scripture in sequence over a period of time.  Each reading (which may take place every day or every Sunday) etc. begins where the previous session ended.  For instance, every Sunday a section of the Bible can be read such that each reading resumes where the previous one ended.

South Australian Church Society: The South Australian Church Society was a British based organisation concerned with the establishment of churches in the new colony of South Australia.  The committee (in 1836) included William Wolryche-Whitmore, Raikes Currie, Pascoe St Leger Grenfell, John Morphett, John Shaw Lefevre, John Rundle and others — and had very strong connections and overlap with the Directors and Commissioners of the South Australia Company.  Their key success was the formation and construction of the Holy Trinity Church, Adelaide on North Terrace and Morphett Street.  The Honorary Secretary was Charles Mann (advocate-general) and Raikes Currie as Treasurer.

The Duchess (horse): The Duchess (1813–1836) was a British Thoroughbred racehorse and broodmare best known for winning the classic St Leger Stakes in 1816.  In a racing career which lasted from March 1815 until October 1819 she competed in thirty-three races and won nineteen times.  She was still unnamed when winning three races as a two-year-old in 1815, when she was one of the leading juveniles in the north of England.  In the following year she was named Duchess of Leven, which was shortened to The Duchess when she was sold to Sir Bellingham Graham.  She won seven of her nine races as a three-year-old, including the Gold Cup at Pontefract and the St Leger at Doncaster.  The Duchess remained in training for a further three seasons, winning five times in 1817, twice in 1818 and twice in 1819, beating many leading horses of the time including Blacklock, Doctor Syntax, Rhoda and Filho da Puta.  After her retirement from racing, The Duchess had some success as a broodmare.

Paulina (horse): Paulina (1804–1819) was a British Thoroughbred racehorse and broodmare best known for winning the classic St Leger Stakes in 1807.  In a racing career which lasted from August 1806 until October 1809 she won nine times from fourteen races, all of which took place in Yorkshire.  She was undefeated in three races as an unnamed two-year-old, before winning three of her four races in 1807 including the St Leger at Doncaster and a valuable produce sweepstakes at York.  She won once from two starts as a four-year-old before winning a Great Subscription Purse at York and a King's Plate at Richmond in 1809.  She had a long rivalry with another Yorkshire mare named Thomasina, winning three of their five meetings.  Paulina was retired to stud where she became the female-line ancestor of many important winners including Andover and Sir Tatton Sykes.

Quiz (horse): Quiz (1798–1826) was a British Thoroughbred racehorse and sire best known for winning the classic St Leger Stakes in 1801.  Quiz was a durable, top-class performer, winning at least once a year in racing career which lasted seven seasons from August 1801 until April 1807.  Apart from the St Leger he won many other important races including three Brocket Hall Gold Cups (beating the Derby winner Eleanor on the third occasion), two Oatlands Stakes at Newmarket Racecourse, a Great Subscription Purse at York, a King's Plate and the Jockey Club Plate (defeating the St Leger winner Cockfighter).  In all he won twenty-one times in thirty-six races for four different owners before being retired to stud, where he proved to be a successful sire of winners.

Pewett: Pewett (1786 – after 1812) was a British Thoroughbred racehorse and broodmare best known for winning the classic St Leger Stakes in 1789.  Her name was spelled in various ways including Pewet, Pewit and Pewitt and would appear to be a reference to the northern lapwing.  In a racing career which lasted from May 1789 and May 1792 she won four of her thirteen races.  In the St Leger she finished second to a colt named Zanga, but was awarded the race when the winner was disqualified for causing interference.  After her retirement from racing she became a successful broodmare whose descendants won many important races throughout the nineteenth and twentieth centuries.

Pascoe St Leger Grenfell: Pascoe St Leger Grenfell (1798–1879) was a British businessman and patron, and a key backer of the South Australian Company.  He was a valued committee member of the South Australian Church Society, and, among other things, he is known for the donation of an acre of land on North Terrace, Adelaide which was used for the construction of the Holy Trinity Church — one of the first churches built in the city and the colony.  He also donated 40 acres of land for the use of the church as glebe lands.  This land later became the suburb of Trinity Gardens.  The significant city street Grenfell Street, Adelaide was named after him.

Holy Trinity Church, Adelaide: Trinity City (also known as Holy Trinity Church Adelaide, and originally named Trinity Church), is an evangelical Anglican church located at 88 North Terrace, in the city of Adelaide, South Australia.  Trinity City has four gatherings at the North Terrace location each Sunday, as well as various other meetings throughout the week.

Julian Grenfell, 3rd Baron Grenfell: Julian Pascoe Francis St Leger Grenfell, 3rd Baron Grenfell (born 23 May 1935) is a Labour hereditary peer and former member of the House of Lords known for his strong Europhile views.

Tehran (horse): Tehran (1941–1966) was a British Thoroughbred racehorse and sire, who raced during World War II and was best known for winning the classic St Leger in 1944.  After showing little ability as a two-year-old he improved in the following spring to win the Culford Stakes on his three-year-old debut.  He ran third in the 2000 Guineas and was narrowly beaten into second place in the Derby Stakes.  After winning the Whepstead Stakes he recorded his biggest win when defeating a strong field in a substitute St Leger.  He won his first three races in 1945 and finished second in the Ascot Gold Cup.  He later became a successful breeding stallion, siring several major winners including Tulyar.

Supporting paragraphs: Pascoe St Leger Grenfell Holy Trinity Church, Adelaide
Answer: four