91600131 divided by 261 
The aim is to understand the frequency of 261 in 91600131.

Moving on to step 1:
261 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 261

Let's proceed to step 2:
If we divide 91 by 261, we get 0 and a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Bring next digit (6) of the dividend behind the 91 and repeat the process: 916 / 261

Going ahead to step 3:
The number 261 fits into 916 3 times, leaving a remainder of 133.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 133 after subtracting 783 from 916.
Grab the next digit (0) from the dividend, add it to 133, then carry on: 1330 / 261

Let's proceed to step 4:
When dividing 1330 by 261, we get 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
The remainder is 25 after subtracting 1305 from 1330.
Append the next digit (0) from the dividend to 25 and continue with: 250 / 261

Going ahead to step 5:
The number 261 fits into 250 0 times, leaving a remainder of 250.
Use 0 as the next digit of our solution. 
Result so far: 350.0
If we take 0 away from 250, we end up with 250.
Bring next digit (1) of the dividend behind the 250 and repeat the process: 2501 / 261

Going ahead to step 6:
If we divide 2501 by 261, we get 9 and a remainder of 152.
Put 9 as the next digit of the answer. 
Result so far: 3509.0
Subtract 2349 from 2501 to get 152.
Bring next digit (3) of the dividend behind the 152 and repeat the process: 1523 / 261

Advancing to step 7:
If we divide 1523 by 261, we get 5 and a remainder of 218.
Write down 5 as next digit of the result. 
Result so far: 35095.0
The remainder is 218 after subtracting 1305 from 1523.
Append the next digit (1) from the dividend to 218 and continue with: 2181 / 261

Step 8:
If we divide 2181 by 261, we get 8 and a remainder of 93.
Use 8 as the next digit of our solution. 
Result so far: 350958.0
If we subtract 2088 from 2181, we get 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Step 9:
261 can be fit into 930 3 times, resulting in a remainder of 147.
Record the quotient 3 as the next digit in the result. 
Result so far: 350958.3
Deduct 783 from 930 and we're left with 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

On to step 10:
If we divide 1470 by 261, we get 5 and a remainder of 165.
Record the quotient 5 as the next digit in the result. 
Result so far: 350958.35
Deduct 1305 from 1470 and we're left with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Step 11:
The number 261 fits into 1650 6 times, leaving a remainder of 84.
Record the quotient 6 as the next digit in the result. 
Result so far: 350958.356
If we take 1566 away from 1650, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 12:
If we divide 840 by 261, we get 3 and a remainder of 57.
Record the quotient 3 as the next digit in the result. 
Result so far: 350958.3563
Subtracting 783 from 840 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 13:
The number 261 fits into 570 2 times, leaving a remainder of 48.
Use 2 as the next digit of our solution. 
Result so far: 350958.35632
If we take 522 away from 570, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 14:
The number 261 fits into 480 1 times, leaving a remainder of 219.
Write down 1 as next digit of the result. 
Result so far: 350958.356321
Subtract 261 from 480 to get 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

On to step 15:
261 can be fit into 2190 8 times, resulting in a remainder of 102.
The number 8 becomes the next digit in our result. 
Result so far: 350958.3563218
The remainder is 102 after subtracting 2088 from 2190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Let's proceed to step 16:
If we divide 1020 by 261, we get 3 and a remainder of 237.
Record the quotient 3 as the next digit in the result. 
Result so far: 350958.35632183
Subtracting 783 from 1020 leaves us with 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

The quotient of the division is 350958.35632183, and the remainder is 2.37e-07.