accede vs run something up the flagpole

accede

verb
  • To agree or assent to a proposal or a view; to give way. 

  • To become a party to an agreement or a treaty. 

  • To come to an office, state or dignity; to attain, assume (a position). 

run something up the flagpole

verb
  • To propose an idea or make a suggestion in order to learn the reaction of others to it. 

How often have the words accede and run something up the flagpole occurred in a corpus of books? (source: Google Ngram Viewer )