blog vs weblog

blog

noun
  • A website that allows users to reflect, share opinions, and discuss various topics in the form of an online journal, sometimes letting readers comment on their posts. Most blogs are written in a slightly informal tone (personal journals, news, businesses, etc.) 

  • An individual post to a blog. 

verb
  • To contribute to a blog. 

  • To blag, to steal something; to acquire something illegally. 

weblog

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