abstinence vs coitus interruptus

abstinence

noun
  • Specifically, the practice of abstaining from sexual intercourse, either permanently or until marriage. 

  • The act or practice of abstaining, refraining from indulging a desire or appetite. 

  • The practice of self-denial; self-restraint; forebearance from anything. 

  • Abstention from certain foods on days of penitential observance. 

  • Delay of spending to accrue capital. 

  • Specifically, the practice of abstaining from intoxicating/alcoholic beverages; total abstinence; teetotalism). 

coitus interruptus

noun
  • Sexual intercourse interrupted by withdrawal of the penis before ejaculation. 

How often have the words abstinence and coitus interruptus occurred in a corpus of books? (source: Google Ngram Viewer )