Which Chief minister has been appointed a maximum number of times?

The person to have been appointed Chief Minister the maximum number of times is M. Karunanidhi. He is the only Chief Minister with 5 terms in office (10 February 1969 - 4 January 1971, 15 March 1971 - 31 January 1976, 27 January 1989 - 30 January 1991, 13 May 1996 - 13 May 2001, 13 May 2006 - 2011).