Heard of Jack Ma's 996 & 669 theory? In summary: a good worker (professional) muz b able to work 9am - 9pm 6 days a week. N a good spouse should b intimate 6x in 6 days and each time muz b long...
Keep the connection alive, don't neglect your relationship. Intimacy is more than just physical intimacy. Talk, go out, do fun stuff together even if it means scheduling time to do it.
My only advice, you just gotta make a effort to maintain intimacy with your spouse
No hard and fast rule really, just as and when and go with the flow(:
Right mood at right timing. Once a week at least
When the mood is right
When the mood needs it
Go with the flows :)
Maybe twice a month
No definite time.