There is a natural cycle to these kinds of drug trends.

Apparently this happens every fifteen years or so as part of a natural cycle.

They make war on the natural cycle and the common farmer.

It will be shorter if the animal's natural cycle is less than 24 hours long.

On average, the natural cycle occurs approximately every 13 years.

Life and death are a part of the natural cycle.

Experts say fires are part of the natural cycle in the West.

Collecting the hits in that order is known as a natural cycle.

The stock market isn't just going through a "natural cycle."

The strong eat the weak in the natural cycle of life.