For income investors, the timing of dividends matters almost as much as the amount received.Many Singapore stocks pay only once or twice a year, which can leave long gaps between payouts.Quarterly payouts help even out your income, making your portfolio easier to manage while giving you more frequent opportunities to reinvest.However, payment frequency should never be the main reason to buy a stock.A useful quarterly dividend needs to be backed by a business that can continue funding it.For companies, that ...