falter vs windrow

falter

verb
  • To cleanse or sift, as barley. 

  • To fail in distinctness or regularity of exercise; said of the mind or of thought. 

  • To hesitate in purpose or action. 

  • To waver or be unsteady; to weaken or trail off. 

  • To stammer; to utter with hesitation, or in a weak and trembling manner. 

  • To stumble. 

  • To lose faith or vigor; to doubt or abandon (a cause). 

noun
  • An unsteadiness. 

windrow

verb
  • To arrange (e.g. new-made hay) in lines or windrows. 

noun
  • The green border of a field, dug up in order to carry the earth onto other land to improve it. 

  • A line of snow left behind by the edge of a snowplow’s blade. 

  • A ridge or berm at a perimeter 

  • A long snowbank along the side of a road. 

  • A line of leaves etc heaped up by the wind. 

  • A similar streak of seaweed etc on the surface of the sea formed by Langmuir circulation. 

  • A line of gravel left behind by the edge of a grader’s blade. 

  • A row of cut grain or hay allowed to dry in a field. 

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