perpetual vs rhythmic

perpetual

adj
  • Continuing; uninterrupted. 

  • Set up to be in effect or have tenure for an unlimited duration. 

  • Lasting forever, or for an indefinitely long time. 

  • Flowering throughout the growing season. 

rhythmic

adj
  • With regular, repetitive motion or sound. 

  • Characterized by rhythm. 

  • Of or relating to rhythm. 

  • Written in verse, especially rhyming verse. 

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