Block vs Moor

Block

name
  • An English surname 

  • A Jewish surname 

  • A surname from German 

  • A surname. 

  • A surname from Dutch 

Moor

name
  • An English surname transferred from the given name. 

  • A surname from Irish. 

noun
  • A member of an Islamic people of Arab or Berber origin ruling Spain and parts of North Africa from the 8th to the 15th centuries. 

  • A member of an ancient Berber people from Mauretania. 

  • A person of an ethnic group speaking the Hassaniya language, mainly inhabiting Western Sahara, Mauritania, and parts of neighbouring countries (Morocco, Mali, Senegal etc.). 

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