mediate vs wheel and deal

mediate

verb
  • To act as an intermediary causal or communicative agent; to convey. 

  • To divide into two equal parts. 

  • To intervene between conflicting parties in order to resolve differences or bring about a settlement. 

  • To resolve differences, or to bring about a settlement, between conflicting parties. 

  • To act as a spiritualistic medium. 

adj
  • Gained or effected by a medium or condition. 

  • Acting through a mediating agency, indirect. 

  • Intermediate between extremes. 

wheel and deal

verb
  • To work as an intermediary, making a profit from by buying and selling things, or making contracts between parties. 

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