I usually don't start with unknown search and instead would just make some guess and only after those failed then I do unknown search but for the sake of teaching a most likely to succeed method unknown search is the one.
Here is a bonus code
[clock]
04000000 026991F0 46EA6000
Freeze the clock to 999
The common way is to search for unknown. Or to try your luck and search for float. Turns out to be float but the number is the displayed x60.