Full Idea
Frege held that analyticity is like a priority in being an epistemic concept.
Gist of Idea
Frege considered analyticity to be an epistemic concept
Source
report of Gottlob Frege (Grundlagen der Arithmetik (Foundations) [1884], §03) by Stewart Shapiro - Thinking About Mathematics 5.1
Book Reference
Shapiro,Stewart: 'Thinking About Mathematics' [OUP 2000], p.108
A Reaction
Kripke very firmly says that this is not so. While a priori is an epistemic concept, analyticity is a semantic concept. I cling on to Kripke's framework, but probably more because it is neat and comfortable than because it is true.