germane vs illogical

germane

noun
  • Any organic derivative of this compound. 

  • germanium tetrahydride, GeH₄ 

adj
  • Related to a topic of discussion or consideration. 

illogical

adj
  • Contrary to logic; lacking sense or sound reasoning. 

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