allow for something—(also: make allowance for something ) take smth. into consideration:
- It will take thirty minutes to get to the station, allowing for traffic delays.
allow of something—leave room for smth.:
- There are more than ten other important issues whose settlement allows of no delay.
Note: Neither expression correlates in meaning with the phrase allow something—permit smth.:
- Do not allow smoking in the car when non-smokers are in it.