The more times you test your pool, the better. With that said, it is also not necessary to waste the contents of your kit by checking it every hour. That is not necessary. And, quite frankly, different chemicals should be tested for at different frequencies.
For your chlorine and pH levels, you should check them at least twice a week (maybe even three times). As for the total alkalinity, get in the habit of doing this once a week. Other chemicals you will not need to worry about as much as frequently, for the most part.