http://imgur.com/zvpOPJs
You'll obviously want to view the full image because this thing is massive in size; any smaller and I couldn't show certain markers, in particular the ones around the prelude to the Cell Games. When it comes to the anime line, the higher the slope of the line, the faster the show covers the various Chapters; if the line is horizontal, that means the anime is not advancing to a new manga Chapter. Each line you pass as you go up or down is two manga Chapters, while each line as you go right or left is a month (in our time, obviously, this isn't an in-universe timeline after all). A gap in either line indicates when that work took at least a week off.
One of the things I noticed when looking at this chart was that, after Goku begins his fight with Vegeta early in the Z anime, the manga starts taking a week off much more frequently. Is he starting to get exhausted at this point and needs some breathing room? On the anime side, the Garlic Jr. arc ultimately doesn't prevent the anime from catching up again, which occurs just before the Cell Games. After that and the Otherworld/Saiyaman filler is wrapped up, the anime makes no further attempts at adding large filler stories until just before the end, instead preferring to take weeks or sometimes even an entire month off, which actually worked somewhat! But what confused me the most was when the anime took an entire month off during October despite the manga having finished; it didn't occur to me until later that of course Toei would be frantically trying to get GT organized to air right when Z finished.
Other interesting tidbits I noticed include the first Cooler movie debuting in the middle of the Goku/Frieza fight in the anime and less than a month after Trunks bisects him in the manga, the Trunks TV Special airing only five months after it was shown in the manga, and that the Bardock Special aired only a few weeks after Frieza began to fight Vegeta, Krillin and Gohan in the manga.
