I agree with roadmaster, doesn't hurt to ease in with every other day at first. If you are new to feeding fish it can help to time some of your feedings in the beginning. Whatever the fish can eat in 2 to 3 minutes should be about right. Many people find when they do this that their idea of a pinch was too big and would be leaving too much excess fishfood in the tank after the 3 minutes (regardless of whether it is actually eaten or not.) (Fishfood and fish waste are basically identical from a nitrogen cycle standpoint.)
Now, once you have an idea how small the amount is, there's not really anything wrong with feeding twice or 3 times a day BUT, the total is that same small pinch, so breaking it up would require really tiny little bits (which actually more closely simulates the wild, but in practice doesn't make for measurably healthier fish I don't believe.)
Its interesting to note that fish can truly go a couple of weeks without food and even three weeks, many report. Many fishkeepers will miss a random day of feeding on purpose. In practice, it often works out that you can just not worry if you discover you've forgotten to feed your fish every now and then.
~~waterdrop~~