acquiescent vs biddable

acquiescent

adj
  • resting satisfied or submissive; disposed tacitly to submit 

  • willing to acquiesce, accept or agree to something without objection, protest or resistance 

biddable

adj
  • Docile, amenable or compliant. 

  • Suitable for bidding. 

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