The Swedish constitution of 1974 allows the Prime Minister of Sweden to appoint one of the Ministers in the cabinet as Deputy Prime Minister ("biträdande statsminister", also unofficially known as "vice statsminister", "Vice Prime Minister"), in case the Prime Minister for some reason is prevented from performing his or her duties.
 However, if a Deputy Prime Minister has not been appointed, the Minister in the cabinet who has served the longest time (and if there are several with equal experience the one who is oldest) takes over as head of government.
 Note that the person acting as Prime Minister does not do so on a permanent basis: if a Prime Minister dies, resigns or loses a vote of confidence in the Riksdag, the Speaker of the Riksdag will then confer with the parties of the Riksdag and propose a new Prime Minister, who must be tolerated by a majority of the Riksdag.
 If the Prime Minister has resigned or lost a vote of confidence, he or she will remain the head of a government "ad interim" until the new Prime Minister assumes his or her office.
 The only case where the governmental line of succession becomes relevant is when the Prime Minister dies (upon which the person next in the line of succession serves as the head of a government "ad interim") or when the Prime Minister is on leave or for any other reason incapable of serving, but still remains in office.
 This might be compared to the Presidential line of succession in the United States, where the person next in line assumes the Presidency throughout the remainder of the term if the President dies, resigns or is impeached.
Mihail Mihaylov born on December 27, 1972, better known as Big Sha or by his previous name, Misho Shamara, is a Bulgarian rapper from Varna, Bulgaria.
 He is known for his socialist leanings and disapproval of Bulgaria's former prime minister Boiko Borisov.
 One of the country's top rap artists in the 1990s and the early 2000s, his career has been waning ever since his partner, Ivan Glavchev (Vanko 1), was sentenced in 2003 to 12 years in prison for running an organization that exported Bulgarian prostitutes, including minors, to France, Spain, Belgium and Italy.
 He openly supported Bulgaria's last socialist-led government, whose decision to appoint a media tycoon known for his links to organized crime as head of the national security agency sparked nationwide protests against the Oresharski cabinet.
 He also provoked indignation by calling Bulgaria's former Finance Minister, Simeon Dyankov, "Jewish scum" in 2013.
A Commerce minister (sometimes business minister, industry minister, trade minister or international trade minister) is a position in many governments that is responsible for regulating external trade and promoting economic growth (commercial policy).
 In many countries, this role is separate from a finance minister, who has more budgetary responsibilities.
Alfredo Rodrigues Gaspar (8 December 1865 in Funchal – 1 December 1938 in Lisbon) was a Portuguese military officer and politician.
 Rodrigues Gaspar was President of the Ministry (Prime Minister) of one of the many governments of the Portuguese First Republic.
The Prime Minister's Official Spokesperson or alternatively Prime Minister's Official Spokesman/Spokeswoman is a position in the United Kingdom's Civil Service, located in the Prime Minister's Office in 10 Downing Street and used by the British Prime Minister to convey information to the public.
 The Prime Minister's Official Spokesperson usually addresses a small group of press and media correspondents, known as lobby correspondents, each morning to deliver statements on current events on behalf of the Prime Minister.
Silvio Berlusconi (] ; born 29 September 1936) is an Italian media tycoon and politician who served as Prime Minister of Italy in four governments.
The La Voce was an Italian daily newspaper published in Milan from March 1994 to April 1995.
 It was founded by journalist Indro Montanelli after a disagreement with Silvio Berlusconi, at that time owner of the "Il Giornale" newspaper of which Montanelli had been the founder and editor in chief.
il Giornale is an Italian language daily newspaper published in Milan, Italy.
Gaspare Spatuzza (Palermo, April 8, 1964), is a Sicilian mafioso from the Brancaccio quarter in Palermo.
 He was a killer for the brothers Filippo and Giuseppe Graviano who headed the Mafia family of Brancaccio.
 After the arrest of the Gravianos in January 1994, he apparently succeeded them as the regent of the Mafia family.
 He was arrested in 1997 and started to cooperate with the judicial authorities in 2008.
 In his testimony he claimed that media tycoon and prime minister Silvio Berlusconi made a deal with the Sicilian Mafia in 1993 that put the country "in the hands" of Cosa Nostra.
José Domingues dos Santos (August 5, 1885 in Lavra, Matosinhos – August 16, 1958 in Porto) was a Portuguese politician, jurist, professor and journalist who, among other positions, served as President of the Council of Ministers (Prime Minister) of one of the many governments of the Portuguese First Republic (1924-1925).
 He was a member of the free masonry, at least since 1922.

Question: In how many governments has the media tycoon who owned Il Giornale in the early 90's serves as Prime Minister of Italy ? 
Answer: four