Throws error when we select digit , why it cant be for single digit

[venkatesh275]

nhale route every 1 hour
patterns.Add("every");
patterns.Add("hour");
patterns.Add("times");
patterns.Add("day");
patterns.Add("1");
here patten.Add (1) throws an error does not support single digit, like 1, 48, 72, need fix what is the solution, because you are checking B> ... so it does not support

please give me a solution to support all single digit , double digit and also many more