aka Day of the Woman. Looking from a wider cultural and social context, this movie could be considered the apogee of the second wave of feminism in America.
I rented this on VHS way back and all the "rape scenes" had been watched so many times that the tape in those areas was totally scratched.
I think the first one lasts like 5 minutes. Then she escapes and then they rape her again and it lasts another 5 minutes. It's pretty much just an anti-feminist porno disguised as a revenge fantasy (the woman is even a self-proclaimed feminist professor or something). Easily one of the most fucked up movies ever made and for all the wrong reasons.
The main character is an outspoken feminist professor\journalist and the entire point of the movie is that she is raped graphically and unrealistically for the sexual arousal of the all male audience.
The revenge fantasy aspect is really just a gimmick.
The 1946 novel this film is very loosely based on is actually quite good. Somewhat corny and naive in parts, but definitely chilling and brutal. By the way, in the novel the feminist is a black guy, and he's not raped.