Okla. Stat. tit. 15, § 15-173: Reasonable time allowed where not specified - Immediate

performance.

If no time is specified for the performance of an act required

to be performed, a reasonable time is allowed. If the act is in its

nature capable of being done instantly, as for example, if it

consists in the payment of money only, it must be performed

immediately upon the thing to be done being exactly ascertained.