We look at the division of 25691707 by 236 
The aim is to understand the frequency of 236 in 25691707.

Advancing to step 1:
When dividing 2 by 236, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 236

On to step 2:
The number 236 fits into 25 0 times, leaving a remainder of 25.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Include the next digit (6) from the dividend after 25, then repeat: 256 / 236

Let's proceed to step 3:
236 goes into 256 1 times with a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 20 after subtracting 236 from 256.
Grab the next digit (9) from the dividend, add it to 20, then carry on: 209 / 236

On to step 4:
When dividing 209 by 236, we get 0 with a remainder of 209.
The next digit of our result is 0. 
Result so far: 10.0
Subtract 0 from 209 to get 209.
Take the next digit (1) from the dividend and append it to 209, then repeat: 2091 / 236

Going ahead to step 5:
If we divide 2091 by 236, we get 8 and a remainder of 203.
The next digit of our result is 8. 
Result so far: 108.0
If we subtract 1888 from 2091, we get 203.
Append the next digit (7) from the dividend to 203 and continue with: 2037 / 236

Advancing to step 6:
When dividing 2037 by 236, we get 8 with a remainder of 149.
Record the quotient 8 as the next digit in the result. 
Result so far: 1088.0
If we subtract 1888 from 2037, we get 149.
Append the next digit (0) from the dividend to 149 and continue with: 1490 / 236

Step 7:
236 goes into 1490 6 times with a remainder of 74.
Write down 6 as next digit of the result. 
Result so far: 10886.0
Subtract 1416 from 1490 to get 74.
Include the next digit (7) from the dividend after 74, then repeat: 747 / 236

Going ahead to step 8:
236 goes into 747 3 times with a remainder of 39.
Write down 3 as next digit of the result. 
Result so far: 108863.0
If we subtract 708 from 747, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 9:
236 can be fit into 390 1 times, resulting in a remainder of 154.
Use 1 as the next digit of our solution. 
Result so far: 108863.1
The remainder is 154 after subtracting 236 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Let's proceed to step 10:
236 can be fit into 1540 6 times, resulting in a remainder of 124.
The next digit of our result is 6. 
Result so far: 108863.16
Subtract 1416 from 1540 to get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

On to step 11:
236 goes into 1240 5 times with a remainder of 60.
Put 5 as the next digit of the answer. 
Result so far: 108863.165
Subtracting 1180 from 1240 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 12:
The number 236 fits into 600 2 times, leaving a remainder of 128.
Write down 2 as next digit of the result. 
Result so far: 108863.1652
If we take 472 away from 600, we end up with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

On to step 13:
236 goes into 1280 5 times with a remainder of 100.
Write down 5 as next digit of the result. 
Result so far: 108863.16525
Deduct 1180 from 1280 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Let's proceed to step 14:
The number 236 fits into 1000 4 times, leaving a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 108863.165254
If we subtract 944 from 1000, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 15:
236 goes into 560 2 times with a remainder of 88.
The number 2 becomes the next digit in our result. 
Result so far: 108863.1652542
Subtract 472 from 560 to get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Moving on to step 16:
If we divide 880 by 236, we get 3 and a remainder of 172.
Put 3 as the next digit of the answer. 
Result so far: 108863.16525423
If we take 708 away from 880, we end up with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

The final result is 108863.16525423 with a remainder of 1.72e-07.