smoothen vs tidy

smoothen

verb
  • To make smooth. 

  • To become smooth. 

tidy

verb
  • To make tidy; to neaten. 

intj
  • Expression of agreement or positive acknowledgement, usually in reply to a question; great, fine. 

adj
  • Generous, considerable. 

  • Appropriate or suitable as regards occasion, circumstances, arrangement, or order. 

  • Arranged neatly and in order. 

  • Not messy; neat and controlled. 

  • Satisfactory; comfortable. 

noun
  • A tabletop container for pens and stationery. 

  • A cover, often of tatting, drawn work, or other ornamental work, for the back of a chair, the arms of a sofa, etc. 

  • The wren. 

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