palpitate vs reverberate

palpitate

verb
  • To cause to beat strongly or rapidly. 

  • To beat strongly or rapidly; said especially of the heart. 

  • To shake tremulously 

reverberate

verb
  • To rebound or recoil. 

  • To return or send back; to repel or drive back; to echo, as sound; to reflect, as light, as light or heat. 

  • To ring or sound with many echos. 

  • To have a lasting effect. 

  • To send or force back; to repel from side to side. 

  • To repeatedly return. 

  • To fuse by reverberated heat. 

  • To shine or reflect (from a surface, etc.). 

adj
  • Driven back, as sound; reflected. 

  • reverberant 

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