Business Cycle

What Does Business Cycle Mean?
The recurring and fluctuating levels of economic activity that an economy experiences over a long period of time. The five stages of the business cycle are growth (expansion), peak, recession (contraction), trough and recovery. At one time, business cycles were thought to be extremely regular, with predictable durations, but today they are widely believed to be irregular, varying in frequency, magnitude and duration.

Investopedia explains Business Cycle
Since the World War II, most business cycles have lasted three to five years from peak to peak. The average duration of an expansion is 44.8 months and the average duration of a recession is 11 months. As a comparison, the Great Depression - which saw a decline in economic activity from 1929 to 1933 - lasted 43 months.