hard-pressed vs on the hop

hard-pressed

adj
  • Barely able. Having difficulty doing something. 

  • Experiencing financial difficulty or difficulty in surviving. 

on the hop

prep
  • Playing truant from school. 

  • Spontaneous; unplanned. 

  • Unprepared; unready and unable to deal with something. 

How often have the words hard-pressed and on the hop occurred in a corpus of books? (source: Google Ngram Viewer )