I had a done posts the past couple years tracking the rates and showing folks that yes, the rates were increased during the first year or so of his term (I think there were 8 increases). One from a couple years ago I had annotated the period just before Yellen started the increases (the "Great Recession" ) -
And specifically when we had finally come out of that recession, the increases before the huge "COVID Recession" -
Unfortunately people got so accustomed to "0%" (technically like 0.25%) that they thought that was how it always was.
I wanted to get an updated chart, so slapping it here for now. 
(from here - https://www.macrotrends.net/2015/fed-funds-rate-historical-chart although I know that the same is here - https://fred.stlouisfed.org/series/FEDFUNDS)
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