This is a great post someone put up, so I am reposting it here . . . the cycles are interesting because Pluto "slows down" as it heads toward the future time ... this is because it has a 17 degree inclination to the orbital plane (Venus is 7 degrees off the orbital plane)
This is a great diagram of the SA . PL conjunctions, I love it so you can see the dates time and elongating time between the conjunction to the next one . . .