blear vs cloud (over)

blear

adj
  • Dim, unclear from water or rheum. 

  • Causing or caused by dimness of sight. 

verb
  • To be blear; to have blear eyes; to look or gaze with blear eyes. 

  • To blur, make blurry. 

  • To make blurred or dim. 

cloud (over)

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