nonvirile vs unforgivable

nonvirile

adj
  • Not virile. 

  • Pertaining to a grammatical gender used in some Slavic languages for plurals of masculine animate, masculine inanimate, feminine, and neuter nouns, i.e. for all groups that do not include men or personal masculine nouns. 

unforgivable

adj
  • Not forgivable; inexcusable. 

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