work-to-rule vs write-in

work-to-rule

adj
  • Of or pertaining to such a protest. 

noun
  • A labor protest in which employees do only the minimum work required by the rules of a workplace, following safety or other regulations to the letter in order to cause a slowdown. 

write-in

adj
  • Pertaining to a write-in. 

noun
  • A candidate whose name is not listed on the ballot. 

  • A vote made for a candidate of this kind. 

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