be in the driver’s seat vs head up

be in the driver’s seat

head up

verb
  • To lead or take the lead in; to direct; to take charge of. 

  • To close (a cask, barrel, etc.) by fitting a head to it. 

  • To turn towards the wind 

How often have the words be in the driver’s seat and head up occurred in a corpus of books? (source: Google Ngram Viewer )