The best dividend growth stocks tend to hike their payouts like clockwork every single year. However, some companies take that a step further by giving their investors a raise each quarter. Two that have a spectacular track record of delivering quarterly increases are Holly Energy Partners (NYSE: HEP) and Enterprise Products Partners (NYSE: EPD), with both having boosted their payouts for more than 50 straight quarters.While that past success bodes well for the future, one of the two appears the more likely to keep its streak going over the long term.Image source: Getty Images.Continue reading