eraser vs ruche

eraser

noun
  • A thing used to erase or remove something written or drawn by a pen or a pencil. 

  • A thing used to erase something written by chalk on a chalkboard, by marker on a whiteboard, or by some other erasable implement; a chalkboard eraser, whiteboard eraser, etc. 

  • One who erases. 

  • An overwriter program used to prevent data recovery. 

ruche

noun
  • A strip of fabric which has been fluted or pleated. 

  • A small ruff of fluted or pleated fabric worn at neck or wrist. 

  • A pile of arched tiles, used to catch and retain oyster spawn. 

verb
  • To bunch up (fabric); to ruck up. 

  • To flute or pleat (fabric). 

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