We look at the division of 231638 by 37 
The aim is to understand the frequency of 37 in 231638.

Moving on to step 1:
If we divide 2 by 37, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 37

On to step 2:
When dividing 23 by 37, we get 0 with a remainder of 23.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 23, we get 23.
Bring next digit (1) of the dividend behind the 23 and repeat the process: 231 / 37

Step 3:
The number 37 fits into 231 6 times, leaving a remainder of 9.
The next digit of our result is 6. 
Result so far: 6.0
Deduct 222 from 231 and we're left with 9.
Take the next digit (6) from the dividend and append it to 9, then repeat: 96 / 37

Let's proceed to step 4:
37 can be fit into 96 2 times, resulting in a remainder of 22.
The next digit of our result is 2. 
Result so far: 62.0
Subtract 74 from 96 to get 22.
Include the next digit (3) from the dividend after 22, then repeat: 223 / 37

Moving on to step 5:
37 goes into 223 6 times with a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 626.0
If we subtract 222 from 223, we get 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 37

Let's proceed to step 6:
The number 37 fits into 18 0 times, leaving a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 6260.0
Deduct 0 from 18 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 7:
The number 37 fits into 180 4 times, leaving a remainder of 32.
Use 4 as the next digit of our solution. 
Result so far: 6260.4
Subtract 148 from 180 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 8:
If we divide 320 by 37, we get 8 and a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 6260.48
The remainder is 24 after subtracting 296 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 9:
The number 37 fits into 240 6 times, leaving a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 6260.486
If we subtract 222 from 240, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 10:
37 can be fit into 180 4 times, resulting in a remainder of 32.
The next digit of our result is 4. 
Result so far: 6260.4864
The remainder is 32 after subtracting 148 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 11:
If we divide 320 by 37, we get 8 and a remainder of 24.
Record the quotient 8 as the next digit in the result. 
Result so far: 6260.48648
If we take 296 away from 320, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 12:
The number 37 fits into 240 6 times, leaving a remainder of 18.
Put 6 as the next digit of the answer. 
Result so far: 6260.486486
Subtract 222 from 240 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 13:
37 can be fit into 180 4 times, resulting in a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 6260.4864864
If we take 148 away from 180, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 14:
The number 37 fits into 320 8 times, leaving a remainder of 24.
Put 8 as the next digit of the answer. 
Result so far: 6260.48648648
The remainder is 24 after subtracting 296 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

After the division, we end up with 6260.48648648 and a remainder of 2.4e-08.