1. The Amazing Spider-Man (1963) (1 Spidey book monthly)
2. The Spectacular Spider-Man Magazine (1968) * lasted 2 issues *
3. Marvel Team-Up vol.1 (1972) (2 Spidey books monthly)
4. Peter Parker, the Spectacular Spider-Man vol.1 (1976) (3 Spidey books monthly) * this book is renamed Spectacular Spider-Man @ issue #134 *
5. Web of Spider-Man (1985) * replaces Marvel Team-Up vol.1 * (3 Spidey books monthly)
6. Spider-Man (1990) (4 Spidey books monthly) * this book is renamed Peter Parker: Spider-Man @ issue #76 *
7. Spider-Man Unlimited vol.1 (1993) (5 Spidey books bi-monthly)
8. Untold Tales of Spider-Man (1995) (6 Spidey books bi-monthly)
9. Sensational Spider-Man vol.1 (1996) * replaces Web of Spider-Man * (6 Spidey books bi-monthly)
10. Spider-Man Team-Up (1996) (7 Spidey books bi-monthly)
11. Marvel Team-Up vol.2 (1997) (8 Spidey books bi-monthly)
* In 1997, Untold Tales of Spider-Man & Spider-Man Team-Up get cancelled * (6 Spidey books bi-monthly)
* In 1998, Spider-Man Unlimited, Spectacular Spider-Man, Sensational Spider-Man & Maevel Team-Up vol.2 get cancelled, Spider-Man renamed Peter Parker: Spider-Man * (2 Spidey books monthly)
12. Webspinners (1999) (3 Spidey books monthly)
* In 2000, Webspinners gets cancelled * (2 Spidey books monthly)
13. Tangled Web (2001) (3 Spidey books monthly)
* In 2003, Tangled Web gets cancelled * (2 Spidey books monthly)
14. Spectacular Spider-Man vol.2 (2003) * replaces Peter Parker: Spider-Man * (2 Spidey books monthly)
15. Spider-Man Unlimited vol.3 (2004) (3 Spidey books bi-monthly) * SU vol.2 was released in 1999 and based on the animated series *
16. Marvel Knights: Spider-Man (2004) (4 Spidey books bi-monthly) * this book is renamed Sensational Spider-Man vol.2 @ issue #23
*
17. Marvel team-Up vol.3 (2005) (5 Spidey books bi-monthly)
* In 2005, Spectacular Spider-Man vol.2 gets cancelled, possibly paving the way for FNSM months later * (4 Spidey books bi-monthly)
18. Friendly Neighborhood Spider-Man (2005) (5 Spidey books bi-monthly)
* In 2006, Marvel Team-Up vol.3 gets cancelled * (4 Spidey books bi-monthly)
And that's where we stand today.
I didn't include Ultimate Spider-Man, as that title really doesn't count, nor did I count any of the Marvel Age stuff or Spidey Super Stories and Marvel tales and other reprint material and non-continuity stuff.
Hope this helps...