What is "frequency dependence"?

Question

This is the sentence: "The frequency dependence of the respiratory sinus arrythmia is a result of the transmission characteristics of the sinoatrial node."

Answer 1

"frequency dependence" means that something (in this case a symptom) is dependent on the frequency of occurrence of something else.  The sentence you quoted, however, is gibberish, written to appear erudite, but in actuality transmitting little or no useful information.  There might be something to be learned from context, or if there is some sort of graphic included.