masdar vs verbal noun

masdar

noun
  • Arabic verbal noun, also used in Georgian grammar (მასდარი) 

verbal noun

noun
  • A noun that is morphologically related to a verb and similar to it in meaning; in English, it contrasts with the gerund and the deverbal noun. 

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