Starting in the United States from 1800, it seems there's one great financial 'panic' in 1857, and not another until 1910, shortly before the FED Reserve took control and started the fiatization and debasement of the currency. So about 50 years between crises.

It seems that the business or boom bust cycles is a relatively new phenomenon and it might just be related to the way the federal reserve handles the money.

Anyone feel free to correct or add info here as im not an authority on historical economics in the united states, but i have always found that the instillation of the federal reserve to be an 'epoch' of sorts for the US economically.