Now that the Dodd-Frank Act forces companies to give shareholders a say on executive pay, the next question they need to answer is how often those advisory votes will occur.

That question of frequency has set off a small battle between some companies that want to limit say-on-pay votes to every three years and shareholder groups who want the votes annually. Early proxy filings indicate that at least some companies are bucking the trend of recommending advisory say-on-pay votes every year, and instead are asking shareholders to vote for triennial votes.