put to vs recommend

put to

verb
  • To ask or pose a question, or make a proposal or suggestion. 

recommend

verb
  • To advise, propose, counsel favorably 

  • To make acceptable; to attract favor to. 

  • To bestow commendation on; to represent favourably; to suggest, endorse or encourage as an appropriate choice. 

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