Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| No. | Race Title | Track | Date | TV |
| --- | --- | --- | --- | --- |
| 1 | NextEra Energy Resources 250 | Daytona International Speedway, Daytona Beach | February 21 | FS1 |
| 2 | Kroger 250 | Martinsville Speedway, Martinsville | March 30† | FS1 |
| 3 | SFP 250 | Kansas Speedway, Kansas City | May 9 | FS1 |
| 4 | North Carolina Education Lottery 200 | Charlotte Motor Speedway, Concord | May 16 | FS1 |
| 5 | Lucas Oil 200 | Dover International Speedway, Dover | May 30 | FS1 |
| 6 | WinStar World Casino 400K | Texas Motor Speedway, Fort Worth | June 6 | FS1 |
| 7 | Gateway 200 | Gateway Motorsports Park, Madison, Illinois | June 14 | FS1 |
| 8 | UNOH 225 | Kentucky Speedway, Sparta | June 26 | FS1 |
| 9 | American Ethanol 200 | Iowa Speedway, Newton | July 12 | FS1 |
| 10 | Mudsummer Classic | Eldora Speedway, New Weston | July 23 | FS1 |
| 11 | Pocono Mountains 150 | Pocono Raceway, Long Pond | August 2 | FS1 |
| 12 | Michigan National Guard 200 | Michigan International Speedway, Brooklyn | August 16 | FS1 |
| 13 | UNOH 200 | Bristol Motor Speedway, Bristol | August 20 | FS1 |
| 14 | Chevy Silverado 250 | Canadian Tire Motorsport Park, Bowmanville, Ontario | August 31 | FS1 |
| 15 | EnjoyIllinois.com 225 | Chicagoland Speedway, Joliet | September 12 | FS1 |
| 16 | UNOH 175 | New Hampshire Motor Speedway, Loudon | September 20 | FS1 |
| 17 | Smith's 350 | Las Vegas Motor Speedway, Las Vegas | September 27 | FS1 |
| 18 | Fred's 250 | Talladega Superspeedway, Talladega | October 18 | FOX |
| 19 | Kroger 200 | Martinsville Speedway, Martinsville | October 25 | FS1 |
| 20 | WinStar World Casino 350K | Texas Motor Speedway, Fort Worth | October 31 | FS1 |
| 21 | Lucas Oil 150 | Phoenix International Raceway, Avondale | November 7 | FS1 |
| 22 | Ford EcoBoost 200 | Homestead-Miami Speedway, Homestead | November 14 | FS1 |
Question:
what are the number of times a race was held in august?
Answer:
4