bitchboy vs weak sister

bitchboy

noun
  • A coward, especially a younger man. 

  • I love being a bitchboy bottom when a top can seduce me properly. 

  • A bottom, usually a younger, submissive male. 

weak sister

noun
  • A person who is cowardly or indecisive. 

  • A person or thing which is the least robust or least dependable member of a group. 

How often have the words bitchboy and weak sister occurred in a corpus of books? (source: Google Ngram Viewer )