31989135 divided by 261 
The aim is to understand the frequency of 261 in 31989135.

Let's proceed to step 1:
If we divide 3 by 261, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 261

Step 2:
261 goes into 31 0 times with a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 31 and we're left with 31.
Bring next digit (9) of the dividend behind the 31 and repeat the process: 319 / 261

Moving on to step 3:
261 can be fit into 319 1 times, resulting in a remainder of 58.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 58 after subtracting 261 from 319.
Grab the next digit (8) from the dividend, add it to 58, then carry on: 588 / 261

On to step 4:
If we divide 588 by 261, we get 2 and a remainder of 66.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 522 from 588 and we're left with 66.
Include the next digit (9) from the dividend after 66, then repeat: 669 / 261

On to step 5:
261 goes into 669 2 times with a remainder of 147.
Record the quotient 2 as the next digit in the result. 
Result so far: 122.0
If we subtract 522 from 669, we get 147.
Take the next digit (1) from the dividend and append it to 147, then repeat: 1471 / 261

Let's proceed to step 6:
261 goes into 1471 5 times with a remainder of 166.
The next digit of our result is 5. 
Result so far: 1225.0
If we take 1305 away from 1471, we end up with 166.
Append the next digit (3) from the dividend to 166 and continue with: 1663 / 261

Moving on to step 7:
The number 261 fits into 1663 6 times, leaving a remainder of 97.
The number 6 becomes the next digit in our result. 
Result so far: 12256.0
Deduct 1566 from 1663 and we're left with 97.
Bring next digit (5) of the dividend behind the 97 and repeat the process: 975 / 261

Moving on to step 8:
975 divided by 261 is 3 with a remainder of 192.
Put 3 as the next digit of the answer. 
Result so far: 122563.0
Deduct 783 from 975 and we're left with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Going ahead to step 9:
The number 261 fits into 1920 7 times, leaving a remainder of 93.
Put 7 as the next digit of the answer. 
Result so far: 122563.7
If we take 1827 away from 1920, we end up with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Advancing to step 10:
When dividing 930 by 261, we get 3 with a remainder of 147.
Record the quotient 3 as the next digit in the result. 
Result so far: 122563.73
The remainder is 147 after subtracting 783 from 930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Moving on to step 11:
When dividing 1470 by 261, we get 5 with a remainder of 165.
The next digit of our result is 5. 
Result so far: 122563.735
If we subtract 1305 from 1470, we get 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Going ahead to step 12:
1650 divided by 261 is 6 with a remainder of 84.
The number 6 becomes the next digit in our result. 
Result so far: 122563.7356
Subtract 1566 from 1650 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Let's proceed to step 13:
If we divide 840 by 261, we get 3 and a remainder of 57.
Write down 3 as next digit of the result. 
Result so far: 122563.73563
Subtract 783 from 840 to get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 14:
When dividing 570 by 261, we get 2 with a remainder of 48.
The next digit of our result is 2. 
Result so far: 122563.735632
Deduct 522 from 570 and we're left 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.

On to step 15:
261 goes into 480 1 times with a remainder of 219.
Put 1 as the next digit of the answer. 
Result so far: 122563.7356321
The remainder is 219 after subtracting 261 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

Step 16:
If we divide 2190 by 261, we get 8 and a remainder of 102.
Write down 8 as next digit of the result. 
Result so far: 122563.73563218
Subtract 2088 from 2190 to get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

The final result is 122563.73563218 with a remainder of 1.02e-07.