Infrequent but strong. The word 'cunt' is used in combination with other words to form insults in a few scenes, repeated several times in one but this has a slightly comedic effect.
Early Christianity is a theme, and there is some Frank discussion of the subject. If you find that more offensive than using cunt as an insult, approach with caution. 'White Christ' is used both as a reference to a person and as an exclamation of surprise, and there is discussion of brutality by missionaries.