I used a frequency for a few weeks and they worked amazingly, but lately they didn't have as much effect, why?Updated a year ago

After some time of using a frequency, you become saturated with that frequency.  It's like you are a sponge and you have soaked up that frequency to the maximum level.

Simply use another frequency for a few days, it could even be a different frequency that is for the same purpose.  eg.  Use Abundance 2, instead of Abundance 1.

Then afterward, go back to that original frequency that really worked well for you, and it should work very effectively again.