frail vs rocky

frail

adj
  • Mentally fragile. 

  • Weak; infirm. 

  • Liable to fall from virtue or be led into sin; not strong against temptation; weak in resolution; unchaste. 

  • Easily broken physically; not firm or durable; liable to fail and perish. 

verb
  • To play a stringed instrument, usually a banjo, by picking with the back of a fingernail. 

noun
  • A basket made of rushes, used chiefly to hold figs and raisins. 

  • A rush for weaving baskets. 

  • The quantity of fruit or other items contained in a frail. 

rocky

adj
  • Encountering many problems; difficult, troubled; also, in danger or distress. 

  • In the style of rock music. 

  • Abounding in, or full of, rocks; consisting of rocks. 

  • Like a rock; rigid, solid. 

  • Having a habitat around or on rocks. 

  • Easily rocked; unstable. 

  • Of a person: ill, or unsteady (for example, as a result of a shock). 

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