bitchboy vs yellowbelly

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. 

yellowbelly

noun
  • A coward. 

  • Someone from Lincolnshire. 

  • The golden perch, Macquaria ambigua. 

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