penning vs poetry

penning

noun
  • Writing; literary composition. 

  • An old currency unit, the Swedish penning. 

poetry

noun
  • A poet's literary production. 

  • An artistic quality that appeals to or evokes the emotions, in any medium; something having such a quality. 

  • Literature composed in verse or language exhibiting conscious attention to patterns and rhythm. 

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