drop off vs grow

drop off

verb
  • To fall. 

  • To deliver; to deposit or leave; to allow passengers to alight. 

  • To lessen or reduce. 

  • To fall asleep. 

grow

verb
  • To appear or sprout. 

  • To become larger, to increase in magnitude. 

  • To undergo growth; to be present (somewhere) 

  • To develop, to mature. 

  • To cause or allow something to become bigger, especially to cultivate plants. 

  • To assume a condition or quality over time. 

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