strike a chord vs touch a nerve

strike a chord

verb
  • To elicit a significant reaction, especially one which is favorable or sympathetic. 

  • To convey a feeling or meaning which someone personally internalizes and takes to heart. 

touch a nerve

verb
  • To make a remark or perform a deed which produces a strong response, especially an emotional response such as anxiety or annoyance, because it calls to mind something which has been a source of concern or embarrassment. 

How often have the words strike a chord and touch a nerve occurred in a corpus of books? (source: Google Ngram Viewer )