pulsing vs rumbling

pulsing

noun

  • The action of something that pulses. 

  • The emission of pulses. 

rumbling

noun

  • A deep low noise. 

  • A muted sound of complaint or discontent. 

adj

  • Deep- and slow-sounding. 

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