We're dividing 74773940 by 966 
The aim is to understand the frequency of 966 in 74773940.

Step 1:
966 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 966

Moving on to step 2:
The number 966 fits into 74 0 times, leaving a remainder of 74.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 74 to get 74.
Fetch the next digit (7) from the dividend, attach it to 74 and continue: 747 / 966

Advancing to step 3:
If we divide 747 by 966, we get 0 and a remainder of 747.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 747 leaves us with 747.
Bring next digit (7) of the dividend behind the 747 and repeat the process: 7477 / 966

Step 4:
If we divide 7477 by 966, we get 7 and a remainder of 715.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Deduct 6762 from 7477 and we're left with 715.
Take the next digit (3) from the dividend and append it to 715, then repeat: 7153 / 966

On to step 5:
966 can be fit into 7153 7 times, resulting in a remainder of 391.
Write down 7 as next digit of the result. 
Result so far: 77.0
If we take 6762 away from 7153, we end up with 391.
Fetch the next digit (9) from the dividend, attach it to 391 and continue: 3919 / 966

Step 6:
966 goes into 3919 4 times with a remainder of 55.
Record the quotient 4 as the next digit in the result. 
Result so far: 774.0
If we take 3864 away from 3919, we end up with 55.
Include the next digit (4) from the dividend after 55, then repeat: 554 / 966

Let's proceed to step 7:
554 divided by 966 is 0 with a remainder of 554.
Record the quotient 0 as the next digit in the result. 
Result so far: 7740.0
If we take 0 away from 554, we end up with 554.
Append the next digit (0) from the dividend to 554 and continue with: 5540 / 966

Step 8:
The number 966 fits into 5540 5 times, leaving a remainder of 710.
Use 5 as the next digit of our solution. 
Result so far: 77405.0
If we subtract 4830 from 5540, we get 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7100, and continue the process.

Let's proceed to step 9:
The number 966 fits into 7100 7 times, leaving a remainder of 338.
The next digit of our result is 7. 
Result so far: 77405.7
Subtract 6762 from 7100 to get 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

Step 10:
966 can be fit into 3380 3 times, resulting in a remainder of 482.
Put 3 as the next digit of the answer. 
Result so far: 77405.73
The remainder is 482 after subtracting 2898 from 3380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4820, and continue the process.

Moving on to step 11:
The number 966 fits into 4820 4 times, leaving a remainder of 956.
Record the quotient 4 as the next digit in the result. 
Result so far: 77405.734
Subtract 3864 from 4820 to get 956.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9560, and continue the process.

On to step 12:
966 can be fit into 9560 9 times, resulting in a remainder of 866.
Put 9 as the next digit of the answer. 
Result so far: 77405.7349
If we subtract 8694 from 9560, we get 866.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8660, and continue the process.

Step 13:
8660 divided by 966 is 8 with a remainder of 932.
Record the quotient 8 as the next digit in the result. 
Result so far: 77405.73498
If we subtract 7728 from 8660, we get 932.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9320, and continue the process.

Advancing to step 14:
The number 966 fits into 9320 9 times, leaving a remainder of 626.
The number 9 becomes the next digit in our result. 
Result so far: 77405.734989
Subtract 8694 from 9320 to get 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Step 15:
966 can be fit into 6260 6 times, resulting in a remainder of 464.
Use 6 as the next digit of our solution. 
Result so far: 77405.7349896
Subtract 5796 from 6260 to get 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Going ahead to step 16:
966 can be fit into 4640 4 times, resulting in a remainder of 776.
Put 4 as the next digit of the answer. 
Result so far: 77405.73498964
Deduct 3864 from 4640 and we're left with 776.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7760, and continue the process.

After the division, we end up with 77405.73498964 and a remainder of 7.76e-07.