The Federal Reserve refers to M1 and M2 statistics (or measures) as Money Stock measures because:

money is the instrument used for trading stocks the numbers represent values as of a particular point in time M1 and M2 represent spending in the economy They are the two primary financial instruments in the U.S. economy

Most seasonal borrowing (from the Fed's discount window) occurs:

in the New York district on Fridays in the Midwest in the five major metropolitan centers of the U.S. Nowhere-because it was eliminated in early 2002