Chinese Pidgin English vs Chinese pidgin English

Chinese Pidgin English

noun
  • An English-based pidgin formerly spoken in Guangzhou and other ports in China. 

Chinese pidgin English

name
  • An English-lexifier pidgin used along the Chinese coast from the 17th to the 19th centuries. 

How often have the words Chinese Pidgin English and Chinese pidgin English occurred in a corpus of books? (source: Google Ngram Viewer )