flaky vs stop-start

flaky

adj
  • Unreliable; working only on an intermittent basis; likely due to malfunction. 

  • Consisting of flakes or of small, loose masses; lying, or cleaving off, in flakes or layers; flakelike. 

  • Unreliable; likely to make plans with others but then abandon those plans. 

stop-start

adj
  • Intermittent; starting and stopping with regularity. 

How often have the words flaky and stop-start occurred in a corpus of books? (source: Google Ngram Viewer )