It's called the charity stripe for a reason. A team that gets fouled in the act of shooting or over and over again in a game, gets to shoot free throws.
The more free throws a team attempts, the better opportunity it has to score and win games.
This is measured through a team's free throw rate.
FTRate = FTA / FGA
The amount of free throw attempts divided by the amount of field goal attempts.
For example, Virginia Tech attempted 964 free throws and 1953 shots over 35 games in 2015-2016.
The Hokies free throw rate was 49.4, the highest amongst all Division-I teams over the course of the season.
FTRate = 964 / 1953 = 0.4936 * 100
A team's ability to prevent their opponent from getting to the foul line is equally important.
If the opposition attempts fewer free throws, it decreases their opportunity to score and increases a team's chance to win.
For example, Utah's defensive free throw rate was the best in the country in the 2015-2016 season.
Utah's opponents attempted 506 free throws and 2226 field goals in 36 games in 2015-2016.
Utah's Free Throw Rate was 23.
FTRate = 506 / 2226 = 0.227 * 100
Free throw rate puts more value on getting to the foul line. Not making foul shots.
Volume is more important in this stat. If a team can attempt more free throws, it has a better chance to score and win.
The assumption is a team that attempts more free throws is better than a team that makes more free throws over time.
In the 2016 NCAA Tournament Second Round match up between Stephen F. Austin and Notre Dame, Stephen F. Austin made every free throw it attempted.
Notre Dame attempted 5 more free throws and won the game by one-point.
The logic here is the more attempts, the more opportunity to make foul shots.
Another way to measure a team's ability to get to the foul line is to include a team's ability to make foul shots, not just attempt them.
This calculation takes free throw makes and divides them by the total number of field goal attempts.
Using the same Virginia Tech example above, the Hokies made 672 free throws over 35 games in the 2015-2016 season.
Using this calculation, Virginia Tech's free throw rate was 34.4.
FTRate = 672 / 1953 = 0.344 * 100
Important: This calculation (makes) is significantly lower than using attempts, 34.4 versus 49.4 in the Virginia Tech example.