courtyard vs front yard

courtyard

noun
  • An area, open to the sky, partially or wholly surrounded by walls or buildings. 

front yard

noun
  • A enclosed and often primarily utilitarian area to the front of a house or similar residence, typically having a hard surface or paving. 

  • A yard to the front of a house or similar residence, typically having a lawn and often trees, shrubs, and/or flowers. 

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