I don't see the logic in your answer, a normal secure password (one that I can remember) like qwerty12345$ has more than 10 million combinations, impossible to get via bruteforce if the attempts are limited to a couple dozen a day, not in a millenium.
Now, having to change every 46 days my password for A DIFFERENT one that I can remember, will only weaken that possibility, the bruteforce attack does not needs to change, he only gets mathematically more chances to get the password every 46 days. Do not tell me that you elaborate a very complex password every 46 days instead using a password with incremental info just to ease your reminder of the last one you used, or even less secure; you write down them.
This only makes sense where there is a hash leak and that's is another history.
References:
pcmag.com/article2/0,2817,2362692,00.asp
cryptosmith.com/node/218
sepago.de/e/helge/2009/06/22/how-forcing-password-changes-actually-weakens-security