fucklet vs side chick

fucklet

noun
  • A woman with whom one shares, or hopes to share, a sexual encounter. 

  • A child, regarded as the result of the process of breeding. 

  • A stupid or annoying person. 

  • A sexual encounter of short duration; a quickie. 

side chick

noun
  • A mistress; a woman one dates in addition to one's girlfriend or wife, usually in secret. 

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