Complex sentence: In the 13th century, the term "hobyn" was used, meaning "small horse or pony," and by 1816 the, "hobby", had been introduced into the vocabulary of an unknown number of English people.
Split into simpler sentences: In the 13th century, the term "hobyn" was used, meaning "small horse or pony". By 1816 the, "hobby", had been introduced into the vocabulary of an unknown number of English people.