We look at the division of 28581 by 37 
The aim is to understand the frequency of 37 in 28581.

On to step 1:
If we divide 2 by 37, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 37

Step 2:
If we divide 28 by 37, we get 0 and a remainder of 28.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 28, we end up with 28.
Grab the next digit (5) from the dividend, add it to 28, then carry on: 285 / 37

Step 3:
37 goes into 285 7 times with a remainder of 26.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 26 after subtracting 259 from 285.
Take the next digit (8) from the dividend and append it to 26, then repeat: 268 / 37

Let's proceed to step 4:
If we divide 268 by 37, we get 7 and a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
Deduct 259 from 268 and we're left with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 37

Advancing to step 5:
91 divided by 37 is 2 with a remainder of 17.
Write down 2 as next digit of the result. 
Result so far: 772.0
Subtracting 74 from 91 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 6:
When dividing 170 by 37, we get 4 with a remainder of 22.
The next digit of our result is 4. 
Result so far: 772.4
If we take 148 away from 170, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 7:
37 goes into 220 5 times with a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 772.45
Deduct 185 from 220 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 8:
37 goes into 350 9 times with a remainder of 17.
Use 9 as the next digit of our solution. 
Result so far: 772.459
Subtracting 333 from 350 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 9:
The number 37 fits into 170 4 times, leaving a remainder of 22.
Write down 4 as next digit of the result. 
Result so far: 772.4594
The remainder is 22 after subtracting 148 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 10:
37 can be fit into 220 5 times, resulting in a remainder of 35.
The next digit of our result is 5. 
Result so far: 772.45945
Subtract 185 from 220 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 11:
If we divide 350 by 37, we get 9 and a remainder of 17.
Write down 9 as next digit of the result. 
Result so far: 772.459459
Subtract 333 from 350 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 12:
The number 37 fits into 170 4 times, leaving a remainder of 22.
Put 4 as the next digit of the answer. 
Result so far: 772.4594594
If we take 148 away from 170, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 13:
When dividing 220 by 37, we get 5 with a remainder of 35.
The next digit of our result is 5. 
Result so far: 772.45945945
Subtract 185 from 220 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final result is 772.45945945 with a remainder of 3.5e-08.