elongate vs string out

elongate

verb
  • To become long or longer by being pulled or stretched; to become elongated. 

  • To make long or longer by pulling and stretching; to make elongated. 

adj
  • Lengthened, extended, elongated; relatively long and slender. 

string out

verb
  • To prolong or extend in an unnecessary, contrived or time-filling manner. 

  • To extend on or as if by strings, wires etc. 

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