There is no wait between degrees. I was a Fourth Degree within one year. I was 63 years old when I took the Fourth Degree Oath. You will meet some of the greatest Catholic gentleman in the world. We have Knights ranging from 18 years old to 90. One of the Knights that became a Fourth Degree the same time I did last year is a World War II veteran of the Battle of the Bulge.
One of the best decisions I ever made was joining the Knights. One of my biggest regrets is I did not join years earlier.
At the Mass at our diocesan Eucharistic Congress, a 4th Degree Knight stands with drawn sword beside each minister of the Eucharist. It really makes you think!