confer vs proffer

confer

verb
  • To grant as a possession; to bestow. 

  • To talk together, to consult, discuss; to deliberate. 

proffer

verb
  • To offer for acceptance; to propose to give; to make a tender of. 

noun
  • An offer made; something proposed for acceptance by another; a tender. 

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