findコマンドの「初期化時間」とは何ですか？

findコマンドのマニュアルページを参照しようとすると、次の問題が発生します。

-mmin n
        The value of n can be one of the following:
          n
               Evaluates as True if the file modification time subtracted from the initialization time, divided by 60 seconds (with any remainder discarded), is
               n.
          -n
               Evaluates as True if the file modification time subtracted from the initialization time, divided by 60 seconds (with any remainder discarded), is
               less than n.
          +n
               Evaluates as True if the file modification time subtracted from the initialization time, divided by 60 seconds (with any remainder discarded), is
               greater than n (in case of UNIX03, greater than n+1).
        Note: Files modified after the find command start time will not be taken into account. However, when the find command is used within the unary NOT
        operator for non-UNIX03 behavior, the files modified after the command start time will be displayed until the value of n.
   -mtime n
        The value of n can be one of the following:
          n
               Evaluates as True if the file modification time subtracted from the initialization time, divided by 86400 seconds (with any remainder discarded),
               is n. 86400 seconds is 24 hours.
          -n
               Evaluates as True if the file modification time subtracted from the initialization time, divided by 86400 seconds (with any remainder discarded),
               is less than n.
          +n
               Evaluates as True if the file modification time subtracted from the initialization time, divided by 86400 seconds (with any remainder discarded),

この初期化時間はいくらですか？今この find コマンドが呼び出される時点ですか？