Email Marketing Question:

Once a month is fine for keeping your name in front of someone. Two-three times a month leaves enough time in between emails so you don't become a nuisance. Obviously, four times a month gets you to a weekly consistency. Essentially, you can keep increasing your send frequency as much as you want, but be conscious of your open and unsubscribe rates. When your engagement starts to decline, you know you've taken it too far.