speak to vs strike a chord

speak to

verb
  • To (figuratively) resonate with; to feel emotionally relevant to. 

  • To address a particular topic. 

  • To give evidence regarding something; to attest or provide evidence for; to bespeak. 

strike a chord

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

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

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