Let's divide 139175 by 81
The aim is to understand the frequency of 81 in 139175.

Moving on to step 1:
When dividing 1 by 81, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 81

Let's proceed to step 2:
If we divide 13 by 81, we get 0 and a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 81

Let's proceed to step 3:
When dividing 139 by 81, we get 1 with a remainder of 58.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 81 from 139 leaves us with 58.
Grab the next digit (1) from the dividend, add it to 58, then carry on: 581 / 81

Step 4:
The number 81 fits into 581 7 times, leaving a remainder of 14.
Write down 7 as next digit of the result. 
Result so far: 17.0
Subtract 567 from 581 to get 14.
Take the next digit (7) from the dividend and append it to 14, then repeat: 147 / 81

Let's proceed to step 5:
81 can be fit into 147 1 times, resulting in a remainder of 66.
Put 1 as the next digit of the answer. 
Result so far: 171.0
Subtracting 81 from 147 leaves us with 66.
Bring next digit (5) of the dividend behind the 66 and repeat the process: 665 / 81

Step 6:
The number 81 fits into 665 8 times, leaving a remainder of 17.
Record the quotient 8 as the next digit in the result. 
Result so far: 1718.0
Deduct 648 from 665 and we're left 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.

Advancing to step 7:
If we divide 170 by 81, we get 2 and a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 1718.2
If we take 162 away from 170, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 8:
81 goes into 80 0 times with a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 1718.2
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 9:
800 divided by 81 is 9 with a remainder of 71.
The number 9 becomes the next digit in our result. 
Result so far: 1718.209
If we take 729 away from 800, we end up with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 10:
If we divide 710 by 81, we get 8 and a remainder of 62.
Use 8 as the next digit of our solution. 
Result so far: 1718.2098
Deduct 648 from 710 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 11:
81 can be fit into 620 7 times, resulting in a remainder of 53.
The next digit of our result is 7. 
Result so far: 1718.20987
Deduct 567 from 620 and we're left with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

On to step 12:
If we divide 530 by 81, we get 6 and a remainder of 44.
The next digit of our result is 6. 
Result so far: 1718.209876
If we take 486 away from 530, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 13:
If we divide 440 by 81, we get 5 and a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 1718.2098765
Deduct 405 from 440 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.

Moving on to step 14:
81 goes into 350 4 times with a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 1718.20987654
Deduct 324 from 350 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

After the division, we end up with 1718.20987654 and a remainder of 2.6e-08.