Trendline period integer syntax queston (sma | ema | wma)

I am looking through the documentation on Splunk about trendlines and sma | ema | wma. In the documentation, it says you must pick an integer between 2 and 1000: https://docs.splunk.com/Documentation/Splunk/7.3.2/SearchReference/Trendline | trendline sma2(muffins) as trend The documentation doesn't say what the period means, but you have to pick a number between 2 and 1000. I assuming "2" is one day, "3" is two days???