cherry pie vs perse

cherry pie

noun

  • Any of various willowherbs 

  • Heliotropium arborescens. 

  • A pie baked with a cherry filling. 

perse

noun

  • A cloth of this colour. 

  • A dark blue-gray colour. 

adj

  • Dark greyish blue or purple. 

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