manji vs thunder cross

manji

noun
  • A left-facing Japanese swastika, primarily used in Buddhism. 

  • A captain or skipper of a boat. 

  • A type of raised bed similar to a cot from South Asia. 

  • A Sikh religious administrative unit. 

thunder cross

noun
  • The swastika, especially in Latvian contexts. 

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