The expression is: عاجلا أو آجلا or عاجلا أم آجلا The difference between the both, I'll explain by an example: َA aw B means it's possible to check A or B, and it's possible to check another one or checking them both. A am B means it's possible to check A or B, with no other chooses. A or B That's the difference. The both are correctly said. The audio voice: http://vocaroo.com/i/s0jAtdtHQPq6

عاجلاً أو آجلاً

عاجلا او اجلا

Sooner or later is عاجلاً أم أجلاً ستواجه مخاوفك عاجلاً أم أجلاً