Vietcong vs web.archive.org

Vietcong

name
  • A communist organization and guerrilla army in South Vietnam and Cambodia that fought the United States, South Korea, Australia, and the South Vietnamese government during the Vietnam War and was supported by communist North Vietnam. 

noun
  • A member of this organization. 

web.archive.org

How often have the words Vietcong and web.archive.org occurred in a corpus of books? (source: Google Ngram Viewer )