jump on vs roust

jump on

verb
  • To attack verbally, to criticise excessively. 

  • To board a vehicle. 

  • To take immediate action regarding; to avail oneself of without delay. 

roust

verb
  • To harass, to treat in a rough way. 

  • to arrest 

  • to rout out of bed; to rouse 

  • to drive strongly 

noun
  • A strong tide or current, especially in a narrow channel. 

How often have the words jump on and roust occurred in a corpus of books? (source: Google Ngram Viewer )