all the same vs as it is

all the same

adv

  • Used other than figuratively or idiomatically: see all, same. 

  • Anyway; nevertheless; nonetheless. 

adj

  • Making no significant difference. 

as it is

adv

  • Used other than figuratively or idiomatically: see as, it, is. 

  • In the actual circumstances (and often contrary to expectations). 

  • Already; without adding further difficulty or complexity. 

How often have the words all the same and as it is occurred in a corpus of books? (source: Google Ngram Viewer )