1.   I asked him on the off chance.

2.   I just called on the off chance.

3.   I keep all of my old clothes on the off chance that they might come back into fashion.

4.   Much effort went into tracing remote family connections abroad on the off chance of identifying a benefactor.

5.   They got to the man as quickly as they could, on the off chance that he was still alive, but he was not.

6.   She thought of ringing him on the off chance of catching him at the flat, but shelved the possibility as unlikely.

7.   Just on the off chance.

8.   Just on the off chance it was that Danny.

9.   And Gary Jones was seeking an OK from co-owner Allen Paulson to run Puzar on the off chance the allowance winner would like an off track.