Fischer played Botvinnik only once because Botvinnik had more important things to do than being champion for 40 years. When Fischer appeared Botvinnik was working on his academic career. He had no interest in beating Fischer.
Botvinnik Fide titlist:
1948 (fixed tournament) - 1957 (Lost to Smslov)
1958 (Smyslov throws rematch on orders) - 1960 (Lost to Tal)
1961 (Deathly ill Tal force to play rematch, loses) -1963 (Lost to Petrosian)
Botninnik held the FIDE title for 13 years, and never managed to win a title match as champion, such was the Soviet chicanery.
Utter Nonsense. Botvinnik won more matches for the title than Bobby Fischer has ever dreamed of.
The cheatin commies dont have it so good now , thanks to Fischer !