drum roll vs paradiddle

drum roll

noun
  • A sound produced by hitting a drum repeatedly and rhythmically over short intervals. 

paradiddle

noun
  • A percussive exercise (one of 26 drum rudiments) which involves playing four even strokes in the order ‘right left right right’ or ‘left right left left’ 

verb
  • To produce percussive sounds of this kind. 

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