car park vs parking

car park

noun
  • An outdoor area or a building where cars may be parked. 

  • A road with serious traffic congestion preventing the movement of vehicles. 

parking

noun
  • Space in which to park a car or other vehicle. 

  • The action of the verb to park. 

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