There is no "magic formula" as every individual has his or her own sex drive. Ideally the goal is to marry someone whose libido is similar to your own. Even with that later on there could be medical issues that arise or stressful events outside of the bedroom, and raising children, which may make sex the last priority for someone.
I've read in the past that the average number of times a married couple has sex is 2-3 times per week. However I don't believe they took into account the lengths of the marriages. Another article defined a "sexless marriage" as any marriage where a couple has sex less than 12 times per year. Nevertheless it did point out that in the end all that matters is if the (couple) is happy/content with their sex life.
Naturally if one person wants sex 4 times a week and their mate feels once a week is ideal there could be problems. Over the course of a year you'd be looking at 208 times VS 52 times. That's a long ways from being "equally yoked." Maybe it's possible they could somehow meet in the middle or the person with the lower sex drive is willing to sexually please their mate without intercourse from time to time.
Lastly it's possible that two people are never going to be sexually compatible. Most couples during the "infatuation phase" of a relationship or "honeymoon period" appear to be (mutually) desirous of passionate sex. Sometimes after there is an "emotional investment" or "commitment" one relaxes and reverts back to their (natural) libido. The person with the higher drive will feel as though they've been duped or fell victim to a "bait & switch".
In the end a person has to decide if sexual incompatibility is a deal breaker.
Not long ago I posed that question on HP and 90% of people stated sexual incompatibility was NOT a good reason to end a marriage.
However I believe if people were asked: Would you rather your mate leave you or cheat on you? Most people would in fact say they prefer their mate to leave them!
Lots of sexually unhappy married people choose to stay and cheat.
The underlying spirit of a “monogamous relationship” is the belief that one is “forsaking all others” (because) they have someone who is “committed” to fulfilling their sexual needs.
No one gets married or enters into a monogamous relationship to STOP having sex! A relationship without sex is pretty much a great “friendship” and a marriage without sex is little more than being “roommates with the same last name”