count how many times a player has played

Hello, i am trying to create a game with two players and each of them will play three times in a row and then they will switch. The players have both the same script and i have created a playermanager script to control who will play. When i press '1' player 1 is playing and when i press '2' player2. The thing is that i want automatically in the start of the game, player 1 to play for 3 times and after that player 2 for 3 more times. My code is :

  if (Input.GetKeyDown("1"))
         {
             if (player2.enabled == true)
             {
                 player2.enabled = false;
                 player1.enabled = true;
              }
             else
              {
                 player1.enabled = true;
                 player2.enabled = false;
              }
         }
 
   if (Input.GetKeyDown("2"))
         {
             if (player1.enabled == true)
             {
                 player1.enabled = false;
                 player2.enabled = true;
             }
             else
             {
                 player2.enabled = true;
                 player2.enabled = false;
             }
         }

The problem is that wherever i try to count, the counters aren't working properly as the Update function is constantly called and when i take off the key pressed thing nothing happens because of that too. Any new ideas? Thanks in advance