Let's divide 90538716 by 236
The aim is to understand the frequency of 236 in 90538716.

On to step 1:
When dividing 9 by 236, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 236

On to step 2:
If we divide 90 by 236, we get 0 and a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Fetch the next digit (5) from the dividend, attach it to 90 and continue: 905 / 236

Going ahead to step 3:
236 can be fit into 905 3 times, resulting in a remainder of 197.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 708 from 905, we get 197.
Fetch the next digit (3) from the dividend, attach it to 197 and continue: 1973 / 236

Moving on to step 4:
If we divide 1973 by 236, we get 8 and a remainder of 85.
Use 8 as the next digit of our solution. 
Result so far: 38.0
Subtracting 1888 from 1973 leaves us with 85.
Take the next digit (8) from the dividend and append it to 85, then repeat: 858 / 236

Moving on to step 5:
If we divide 858 by 236, we get 3 and a remainder of 150.
Record the quotient 3 as the next digit in the result. 
Result so far: 383.0
Subtract 708 from 858 to get 150.
Grab the next digit (7) from the dividend, add it to 150, then carry on: 1507 / 236

Step 6:
236 can be fit into 1507 6 times, resulting in a remainder of 91.
The number 6 becomes the next digit in our result. 
Result so far: 3836.0
If we subtract 1416 from 1507, we get 91.
Fetch the next digit (1) from the dividend, attach it to 91 and continue: 911 / 236

On to step 7:
911 divided by 236 is 3 with a remainder of 203.
Use 3 as the next digit of our solution. 
Result so far: 38363.0
Subtracting 708 from 911 leaves us with 203.
Include the next digit (6) from the dividend after 203, then repeat: 2036 / 236

Step 8:
The number 236 fits into 2036 8 times, leaving a remainder of 148.
Record the quotient 8 as the next digit in the result. 
Result so far: 383638.0
Subtract 1888 from 2036 to get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Step 9:
1480 divided by 236 is 6 with a remainder of 64.
The next digit of our result is 6. 
Result so far: 383638.6
If we subtract 1416 from 1480, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 10:
The number 236 fits into 640 2 times, leaving a remainder of 168.
Use 2 as the next digit of our solution. 
Result so far: 383638.62
The remainder is 168 after subtracting 472 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Advancing to step 11:
The number 236 fits into 1680 7 times, leaving a remainder of 28.
Put 7 as the next digit of the answer. 
Result so far: 383638.627
If we subtract 1652 from 1680, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 12:
236 goes into 280 1 times with a remainder of 44.
The number 1 becomes the next digit in our result. 
Result so far: 383638.6271
Subtract 236 from 280 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 13:
If we divide 440 by 236, we get 1 and a remainder of 204.
Put 1 as the next digit of the answer. 
Result so far: 383638.62711
Subtract 236 from 440 to get 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

The final result is 383638.62711 with a remainder of 0.000204.