We look at the division of 57191655 by 961 
The aim is to understand the frequency of 961 in 57191655.

On to step 1:
5 divided by 961 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 961

Let's proceed to step 2:
961 goes into 57 0 times with a remainder of 57.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 57 after subtracting 0 from 57.
Fetch the next digit (1) from the dividend, attach it to 57 and continue: 571 / 961

Advancing to step 3:
961 goes into 571 0 times with a remainder of 571.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 571 and we're left with 571.
Append the next digit (9) from the dividend to 571 and continue with: 5719 / 961

Moving on to step 4:
If we divide 5719 by 961, we get 5 and a remainder of 914.
The next digit of our result is 5. 
Result so far: 5.0
If we subtract 4805 from 5719, we get 914.
Append the next digit (1) from the dividend to 914 and continue with: 9141 / 961

Advancing to step 5:
961 goes into 9141 9 times with a remainder of 492.
Record the quotient 9 as the next digit in the result. 
Result so far: 59.0
If we take 8649 away from 9141, we end up with 492.
Grab the next digit (6) from the dividend, add it to 492, then carry on: 4926 / 961

Let's proceed to step 6:
If we divide 4926 by 961, we get 5 and a remainder of 121.
Use 5 as the next digit of our solution. 
Result so far: 595.0
If we take 4805 away from 4926, we end up with 121.
Grab the next digit (5) from the dividend, add it to 121, then carry on: 1215 / 961

On to step 7:
961 goes into 1215 1 times with a remainder of 254.
Write down 1 as next digit of the result. 
Result so far: 5951.0
Deduct 961 from 1215 and we're left with 254.
Include the next digit (5) from the dividend after 254, then repeat: 2545 / 961

Advancing to step 8:
When dividing 2545 by 961, we get 2 with a remainder of 623.
Use 2 as the next digit of our solution. 
Result so far: 59512.0
The remainder is 623 after subtracting 1922 from 2545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6230, and continue the process.

Going ahead to step 9:
If we divide 6230 by 961, we get 6 and a remainder of 464.
The number 6 becomes the next digit in our result. 
Result so far: 59512.6
Subtracting 5766 from 6230 leaves us with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Moving on to step 10:
961 can be fit into 4640 4 times, resulting in a remainder of 796.
Put 4 as the next digit of the answer. 
Result so far: 59512.64
The remainder is 796 after subtracting 3844 from 4640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7960, and continue the process.

Going ahead to step 11:
961 can be fit into 7960 8 times, resulting in a remainder of 272.
Put 8 as the next digit of the answer. 
Result so far: 59512.648
The remainder is 272 after subtracting 7688 from 7960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Let's proceed to step 12:
The number 961 fits into 2720 2 times, leaving a remainder of 798.
Put 2 as the next digit of the answer. 
Result so far: 59512.6482
Subtract 1922 from 2720 to get 798.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7980, and continue the process.

Step 13:
961 goes into 7980 8 times with a remainder of 292.
The next digit of our result is 8. 
Result so far: 59512.64828
The remainder is 292 after subtracting 7688 from 7980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Going ahead to step 14:
2920 divided by 961 is 3 with a remainder of 37.
Record the quotient 3 as the next digit in the result. 
Result so far: 59512.648283
If we take 2883 away from 2920, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 15:
370 divided by 961 is 0 with a remainder of 370.
The next digit of our result is 0. 
Result so far: 59512.648283
Deduct 0 from 370 and we're left with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Moving on to step 16:
When dividing 3700 by 961, we get 3 with a remainder of 817.
The number 3 becomes the next digit in our result. 
Result so far: 59512.64828303
If we take 2883 away from 3700, we end up with 817.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8170, and continue the process.

After the division, we end up with 59512.64828303 and a remainder of 8.17e-07.