Easiest way to do frame animation with varying frame times

I have a sprite of a kid and i want to make him blink. I have 2 images one with open eyes and other with blinking. i want to animate him and i want the frame with open eyes to stay for a longer time and the one with closed eyes for a shorter time. i am new to cocos2dx so pleas i would love it if you could give a detailed thorough answer with all the coding. thank u