forthcoming vs penilingus

forthcoming

noun
  • An act of coming forth. 

  • Something that is yet to come. 

adj
  • Available when needed; in place, ready. 

  • Willing to co-operate or provide information; candid, frank, responsive. 

  • Approaching or about to take place. 

penilingus

noun
  • Fellatio. 

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