fracture vs lay low

fracture

verb
  • To break, or cause something to break. 

  • To amuse (a person) greatly; to split someone's sides. 

noun
  • A break in bone or cartilage. 

  • An instance of breaking, a place where something has broken. 

  • A fault or crack in a rock. 

lay low

verb
  • To topple or overcome; to cause to fall; (of a person) to knock out. 

  • simple past tense of lie low 

  • To lie low, to be inconspicuous, especially when the potential object of search. 

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