feel out vs prospect

feel out

verb
  • To try to ascertain a person's point of view, or the nature of a situation, by cautious and subtle means. 

prospect

verb
  • To determine which minerals or metals are present in a location. 

  • To search, as for gold. 

noun
  • Relative position of the front of a building or other structure; face; relative aspect. 

  • A hope; a hopeful. 

  • The act of looking forward; foresight; anticipation. 

  • A position affording a fine view; a lookout. 

  • The region which the eye overlooks at one time; view; scene; outlook. 

  • A picturesque or panoramic view; a landscape; hence, a sketch of a landscape. 

  • Any player whose rights are owned by a top-level professional team, but who has yet to play a game for said team. 

  • The potential things that may come to pass, often favorable. 

  • A potential client or customer. 

  • The façade of an organ. 

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