imperfective vs repeating

imperfective

noun
  • The imperfective aspect; a verb having this aspect. 

adj
  • Of, relating to or having the properties of the imperfective aspect. 

repeating

noun
  • Repetition. 

adj
  • That repeats; repetitive. 

  • Of a decimal: recurring. 

  • Of a firearm: capable of firing multiple times without needing recharging. 

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