How often do you generate lead in email marketing?

[Brajet]

Apart from learning how to gain new lead, there is a need to learn how to do this very much often. There are various ways this can be done. The first step is to learn how to get websites scrapped from the internet using different tools. Then there must be some intervals for this action to know when and why this need to be done.

At least, doing this at intervals of a month can be regarded as being healthy. What do you think?