biddability vs self-effacement

biddability

noun
  • The extent to which something or someone is biddable. 

  • The quality of being biddable. 

self-effacement

noun
  • The act of keeping oneself in the background, as in humility. 

How often have the words biddability and self-effacement occurred in a corpus of books? (source: Google Ngram Viewer )