inflected vs inflectional

inflected

adj
  • bent or curved inward or downward 

  • Changed in form to reflect function (referring to a word). 

  • Having inflected word forms; fusional. 

  • Deviating from a straight line. 

inflectional

adj
  • Of or pertaining to a point of inflection of a curve. 

  • Of or pertaining to inflection. 

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