surveys is a form of:

Whenever



adverb
1.
(At whatever time, on whatever occasion) Come whenever you please ដែលដរាប, ពេលណាដែល
Example: I'm always ready whenever he may come, Whenever will he arrival Dang's very late.whenever you are hungry, eat something កាលណា
ENGLISH MEANING
Conjunction
1.
At whatever time.