You can think of the liquidity pool as a body of water that people are constantly taking from and adding to. If the pool is the size of a bucket, even a few cupfuls in or out affect how much water is left, and therefore how much you pay for it. If the pool is the size of a lake, even thousands of cupfuls in or out have no measurable effect on the water level in the lake.
The horizontal axis shows the time; relationships positioned towards the leftmost area of a diagram occurred at the start of the data interval considered, and those at the rightmost end occurred at the end of the data interval considered. The vertical axis shows the period; lower period bands (higher frequencies) are shown near the top and higher bands (lower frequencies) are near the bottom. Lower bands would be of interest to investors with short term horizons, whereas higher bands would be of interest to investors with longer term horizons.

COP26: 'How do I deal with eco-anxiety? I don't' VideoCOP26: 'How do I deal with eco-anxiety? I don't'
WASHINGTON (AP) — With inflation at its highest point in three decades, the Federal Reserve is set this week to begin winding down the extraordinary aid it has given the economy since the pandemic recession struck early last year, a process that could prove to be a risky balancing act.