From 2016. The info on how long each coach had the job his not coming up easily. The articles are interesting in the way they define the pressure to win as a business decision, and the trend is getting shorter.
https://www.cbssports.com/college-football/news/why-big-programs-like-lsu-are-firing-coaches-earlier-in-the-season-than-ever-before/
In-season coaching changes before November
Year
Coach, Team
Date
Reason
2016
Les Miles, LSU
Sept. 25
Fired
2016
Ron Turner, FIU
Sept. 25
Fired
2015
Tim Beckman, Illinois
Aug. 28
Fired
2015
Dan McCarney, North Texas
Oct. 10
Fired
2015
Randy Edsall, Maryland
Oct. 11
Fired
2015
Steve Spurrier, South Carolina
Oct. 12
Retired
2015
Steve Sarkisian, USC
Oct. 12
Fired
2015
Al Golden, Miami
Oct. 25
Fired
2015
George O'Leary, UCF
Oct. 26
Retired
2015
Jerry Kill, Minnesota
Oct. 28
Retired
2014
June Jones, SMU
Sept. 8
Resigned
2014
Charlie Weis, Kansas
Sept. 28
Fired
2014
Jeff Quinn, Buffalo
Oct. 13
Fired
2013
Lane Kiffin, USC
Sept. 29
Fired
2013
Paul Pasqualoni, Connecticut
Sept. 30
Fired
2013
Don Treadwell, Miami (OH)
Oct. 6
Fired
2012
Robb Akey, Idaho
Oct. 21
Fired
2011
Mike Locksley, New Mexico
Sept. 26
Fired
2011
Mike Stoops, Arizona
Oct. 10
Fired
2011
Bob Toledo, Tulane
Oct. 18
Resigned
2010
Tim Brewster, Minnesota
Oct. 17
Fired
2010
Todd Dodge, North Texas
Oct. 20
Fired
2008
Tommy Bowden, Clemson
Oct. 14
Fired
2008
Tyrone Willingham, Notre Dame
Oct. 28
Fired*
2007
Phil Bennett, SMU
Oct. 28
Fired*
2006
John Bunting, North Carolina
Oct. 22
Fired*
2005
Bobby Wallace, Temple
Oct. 10
Fired*
2004
John Robinson, UNLV
Sept. 27
Retired*
2004
Ron Zook, Florida
Oct. 25
Fired*
2003
John Mackovic, Arizona
Sept. 29
Fired
2003
Todd Berry, Army
Oct. 14
Fired
2003
Jackie Sherrill, Mississippi State
Oct. 18
Retired*
2003
Carl Franks, Duke
Oct. 19
Fired
2002
Bobby Keasler, Louisiana-Monroe
Sept. 18
Resigned
2001
Charlie Weatherbie, Navy
Oct. 29
Fired
2000
Gary Blackney, Bowling Green
Sept. 26
Resigned*