4cb68544__Capital_One___Credit_Line_FAQ__If_your_letter_says_
[What that means] We generally don’t change an account's credit line more often than every six months. [What you can do] Please wait six months after your last credit line change and then check back with us regarding a credit line increase. [If your letter says:] 
There has recently been a change to the credit line on this account.
Credit Line Increase FAQ | Capital One - Credit Line FAQ
If your letter says: