We look at the division of 137821 by 75 
The aim is to understand the frequency of 75 in 137821.

Step 1:
When dividing 1 by 75, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 75

On to step 2:
When dividing 13 by 75, we get 0 with a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Take the next digit (7) from the dividend and append it to 13, then repeat: 137 / 75

Advancing to step 3:
When dividing 137 by 75, we get 1 with a remainder of 62.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 75 from 137 to get 62.
Grab the next digit (8) from the dividend, add it to 62, then carry on: 628 / 75

On to step 4:
If we divide 628 by 75, we get 8 and a remainder of 28.
Use 8 as the next digit of our solution. 
Result so far: 18.0
Subtract 600 from 628 to get 28.
Append the next digit (2) from the dividend to 28 and continue with: 282 / 75

Step 5:
282 divided by 75 is 3 with a remainder of 57.
Record the quotient 3 as the next digit in the result. 
Result so far: 183.0
The remainder is 57 after subtracting 225 from 282.
Append the next digit (1) from the dividend to 57 and continue with: 571 / 75

On to step 6:
75 can be fit into 571 7 times, resulting in a remainder of 46.
Use 7 as the next digit of our solution. 
Result so far: 1837.0
Deduct 525 from 571 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 7:
75 goes into 460 6 times with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 1837.6
The remainder is 10 after subtracting 450 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
100 divided by 75 is 1 with a remainder of 25.
Write down 1 as next digit of the result. 
Result so far: 1837.61
If we take 75 away from 100, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 9:
When dividing 250 by 75, we get 3 with a remainder of 25.
The number 3 becomes the next digit in our result. 
Result so far: 1837.613
Deduct 225 from 250 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 10:
If we divide 250 by 75, we get 3 and a remainder of 25.
Record the quotient 3 as the next digit in the result. 
Result so far: 1837.6133
If we subtract 225 from 250, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

In conclusion, the division gives 1837.6133 with a balance of 0.00025.