germane vs relating

germane

noun
  • Any organic derivative of this compound. 

  • germanium tetrahydride, GeH₄ 

adj
  • Related to a topic of discussion or consideration. 

relating

noun
  • The act of relating, or forming or identifying relationships; relation. 

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