Inflation is not the same as an increase in the money supply ("dilution" as you call it). Inflation defined as an increase in consumer prices. Consumer prices

Inflation is not the same as an increase in the money supply ("dilution" as you call it). Inflation defined as an increase in consumer prices. Consumer prices are affected by many factors other than the money supply, for example if oil prices rise then it tends to push up consumer prices and therefore inflation even if the money supply were static.