glassen vs glaze over

glassen

verb
  • To coat or cover (e.g. pottery, etc.) with glaze; make glassy. 

adj
  • Resembling glass; glassy; glazed. 

  • Made of or consisting of glass. 

glaze over

verb
  • To form a glazed coating: to ice over or otherwise to become covered in a glossy sheen. 

  • To gloss over. 

  • To become unfocused, as if through boredom. 

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