offeror vs solicitant

offeror

noun
  • One who makes an offer to another. 

  • Someone who presents something to another for acceptance or rejection. 

solicitant

noun
  • One who solicits. 

  • A priest who abused the confessional to solicit women. 

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