frequent vs stop-start

frequent

adj
  • Occurring at short intervals. 

  • Done or occurring often; common. 

  • Addicted to any course of conduct; inclined to indulge in any practice; habitual; persistent. 

verb
  • To visit often. 

stop-start

adj
  • Intermittent; starting and stopping with regularity. 

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