hit the bricks vs work to rule

hit the bricks

verb
  • To participate in a workplace strike or other job action; to participate in a public protest, especially one involving picketing. 

  • To travel about, especially on foot. 

  • To leave or depart; to get out. 

work to rule

verb
  • To work slowly by strictly following all work rules, usually in a work-to-rule job action, as part of unionized labor protest. 

How often have the words hit the bricks and work to rule occurred in a corpus of books? (source: Google Ngram Viewer )