quill pen vs rectrix

quill pen

noun
  • A pen (writing instrument) made from a quill (a wing or tail feather of a large bird). 

rectrix

noun
  • A flight feather on the tails of birds, used for directional control. 

  • A governess; a rectoress. 

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