Go to the source, the official USCIS website. See link below. The processing times will depend on which service center your petitions are pending at.
Daniel Green, Esq.
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The Visa Bulletin tracks priority dates. Visas for a spouse of a US Citizen are always current, there is no priority date. However, the USCIS does provide a website to get information on current processing dates. I've included a link below. Usually it's about five months, or so they claim.
Law Office of Keith S. Massey Jr. LLC, Lakewood, New Jersey. (732) 905-0353. http://www.masseydefense.com Answers provided for informational purposes only. None of the information contained herein is intended to create, nor creates, an attorney-client relationship, is not legal advice, and should not be used without first consulting an attorney.