Unfortunately, if you're talking about Corona to Irvine, you're also talking about one of the worst commutes in southern California. Two hours in heavy rush hour traffic one way. San Bernardino is better, about 45 minutes one way. Nights and weekends are better sometimes, but not always.
You could try commuter lanes (Although you need two people for those or you get $300 tickets. Don't try dummies, they'll nail you for that too ... LOL.) Or Fast Track, which costs some extra money (I don't know how much.) Both of those options don't always help, however.
Of course, none of this takes into account accidents which can delay you for hours on end.
Welcome to SoCal, where commuting and traffic reports are part of daily life!
P.S. Have you been to Corona? It does have a distinctive smell, so to speak. Namely, dairy farms. Just thought I'd mention it, in case you didn't know.