In most of the studies it was shown that those who meditated on a daily basis realized more benefits from the practice than those who meditated occasionally. However, those that meditated occasionally also received benefits in comparison to those who did not meditate at all. So there are some benefits available to those who only meditate once in a while, but many more benefits for those who meditate regularly.
So, if you are considering meditation as a way to improve your life in some way, just consider the many benefits and all the research that shows how beneficial meditation can be.

Infographic by: meditativewisdom.com