fast track vs run interference

fast track

verb
  • To progress something with unusual rapidity. 

noun
  • A racetrack with optimum conditions for high speeds 

  • A railroad for express trains. 

  • The quickest or most direct method or path. 

  • A high-pressure or intensely competitive situation, particularly one characterised by rapid advancement. 

run interference

verb
  • To handle problems or remove obstacles for another person, especially for a person in authority 

How often have the words fast track and run interference occurred in a corpus of books? (source: Google Ngram Viewer )