hold the line vs stick with

hold the line

verb
  • To firmly maintain one's viewpoint, principles, or situation; to refuse to change one's practices or plans. 

stick with

verb
  • To follow or adhere to. 

  • To endure in the memory of. 

  • To remain close to. 

  • Used other than figuratively or idiomatically: see stick, with. 

  • To follow loyally. 

  • To persist in using or employing. 

How often have the words hold the line and stick with occurred in a corpus of books? (source: Google Ngram Viewer )