Frequency refers to how many cycles the staff vibrates at strike activation. http://en.wikipedia.org/wiki/Frequency
In Tom's book Aikido Aikibojitsu and The Structure of Natural Law
page 232 he mentions an intermediate practitioner can achieve 1 or 2 cycles while an advanced practitioner may be able to achieve 4 or more.
It's impossible for me to count in person because the very act of staring at the asymptote will cause me to become uke-centric and deny correct form. If I were to guess estimating peripherally my regular high frequency activations are around 15 to 20 cycles. My attenuated activations could easily be 30 to 60 cycles. It's an unbelievable experience.
Unbelievable indeed. Got any evidence for this claim?