This is the 13069th most frequent Spanish word.
poquito
A tiny amount; very little.
Here, 'poquito' is used as a diminutive of 'poco' to indicate a very small amount.
Solo necesito un poquito de sal.
I just need a little bit of salt.
In this case, 'poquito' conveys a short duration of time, emphasizing the smallness of the interval.
Si puedes esperar un poquito más, estaremos listos.
If you can wait a little bit longer, we will be ready.
Here, 'poquito' is used adverbially to add nuance to the adjective 'cansado', lightly softening its meaning.