How to add randomness to the Breeze?

In Vue 8.4 updated xStream, I have made a new scene with ecosystem plants and added a wind property with ventilator.
But unsuccessfully the wind and the ventilators aren't good for my situation because the wind is very strong:

• It doesn't allow the intensity below the value of 1, and the plants affected by ventilator are bent bottom very much to the ground.

• I tried to set the fallof of the ventilator in the manner that the force applied by the wind is not too high, but the result is not acceptable.
  It is more indicated for a helicopter that bends the plants below it.

• Thus I tried to disable the wind and enable just the Breeze in the AtmosphereEditor.
  But the main problem is that:

• The "YellowMapleTree" Ecosystem Plants follow the proper family Frequency of breeze, thus the effect is not realistically correct.
  Also the "RuralMapleTree" and the "PlumTree" family, follow our separate family frequency of breeze.

• I want that, globally, the ecosystem plants follow a randomness frequency of breeze, instead of following the proper typical frequency.

• How can I do to achieve this random effect, without using a separate per-plant object creation, (instead of ecosystem plants) and without adjusting the per-plant basis wind?

Thanks for a response!
Horsepower0171.