There are many ways to calculate the volatility. timeframe does not metter. it can be monthly quarterly or daily data. You can call them as volatility metrics.
Volatility is the degree of trading price over a specific time window. Historical volatility is the degree of price changes of past market prices.Volatility indicates the risk your are taking by investing into a specific instrument.
here are some simple methods
Best and worst returns
A volatility measure is to find worst and best returns for a specific time.
For example, SPY has worst return -8% and best return +4%. Volatility measure is +4%/-8%.
Another measure is standard deviation of monthly returns.
Number of trading days in access of 1%
A fourth volatility metric is the number of trading days during a year on which the price of an asset increased or decreased by more than 1 percent.
Average true range (ATR) is a technical analysis volatility indicator originally developed by J. Welles Wilder, Jr. for commodities
see : Average true range - Wikipedia, the free encyclopedia
I hope this helps