Do the databases you use have regular updates with new information? Or are they static? Do they allow users to submit corrections or alternate readings of names? If you do not know, you may be missing out on your research. And if you do know, are you keeping track of when you search these “in flux” databases? If not, you could be missing out if you never re-research them for your family members. Your initial search in January will miss new information that is added in March or alternate readings of a census entry that another family historian posts in February.
Is it necessary to search these databases every day? No. However, those of us who fail to find our ancestors in a dynamic database should periodically search the database again to determine if the ancestor is still not there.