fucklet vs sex partner

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. 

sex partner

noun
  • Someone that one has sex with, especially on an informal or casual basis. 

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