83619484 divided by 815 
The aim is to understand the frequency of 815 in 83619484.

Advancing to step 1:
When dividing 8 by 815, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 815

On to step 2:
83 divided by 815 is 0 with a remainder of 83.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 83, we get 83.
Append the next digit (6) from the dividend to 83 and continue with: 836 / 815

Going ahead to step 3:
815 goes into 836 1 times with a remainder of 21.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 815 from 836 to get 21.
Fetch the next digit (1) from the dividend, attach it to 21 and continue: 211 / 815

Let's proceed to step 4:
815 goes into 211 0 times with a remainder of 211.
Use 0 as the next digit of our solution. 
Result so far: 10.0
The remainder is 211 after subtracting 0 from 211.
Append the next digit (9) from the dividend to 211 and continue with: 2119 / 815

Moving on to step 5:
2119 divided by 815 is 2 with a remainder of 489.
Use 2 as the next digit of our solution. 
Result so far: 102.0
Subtract 1630 from 2119 to get 489.
Bring next digit (4) of the dividend behind the 489 and repeat the process: 4894 / 815

Going ahead to step 6:
If we divide 4894 by 815, we get 6 and a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 1026.0
Subtracting 4890 from 4894 leaves us with 4.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 815

On to step 7:
815 goes into 48 0 times with a remainder of 48.
Put 0 as the next digit of the answer. 
Result so far: 10260.0
The remainder is 48 after subtracting 0 from 48.
Grab the next digit (4) from the dividend, add it to 48, then carry on: 484 / 815

On to step 8:
815 can be fit into 484 0 times, resulting in a remainder of 484.
Record the quotient 0 as the next digit in the result. 
Result so far: 102600.0
Subtracting 0 from 484 leaves us with 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

Let's proceed to step 9:
The number 815 fits into 4840 5 times, leaving a remainder of 765.
Use 5 as the next digit of our solution. 
Result so far: 102600.5
Subtracting 4075 from 4840 leaves us with 765.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7650, and continue the process.

Going ahead to step 10:
7650 divided by 815 is 9 with a remainder of 315.
Put 9 as the next digit of the answer. 
Result so far: 102600.59
Deduct 7335 from 7650 and we're left with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Let's proceed to step 11:
3150 divided by 815 is 3 with a remainder of 705.
Use 3 as the next digit of our solution. 
Result so far: 102600.593
Subtracting 2445 from 3150 leaves us with 705.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7050, and continue the process.

Going ahead to step 12:
If we divide 7050 by 815, we get 8 and a remainder of 530.
The number 8 becomes the next digit in our result. 
Result so far: 102600.5938
The remainder is 530 after subtracting 6520 from 7050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Advancing to step 13:
815 can be fit into 5300 6 times, resulting in a remainder of 410.
Put 6 as the next digit of the answer. 
Result so far: 102600.59386
If we subtract 4890 from 5300, we get 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Going ahead to step 14:
When dividing 4100 by 815, we get 5 with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 102600.593865
Deduct 4075 from 4100 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.

Let's proceed to step 15:
815 can be fit into 250 0 times, resulting in a remainder of 250.
Write down 0 as next digit of the result. 
Result so far: 102600.593865
Deduct 0 from 250 and we're left with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Let's proceed to step 16:
When dividing 2500 by 815, we get 3 with a remainder of 55.
Put 3 as the next digit of the answer. 
Result so far: 102600.59386503
Subtract 2445 from 2500 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

After the division, we end up with 102600.59386503 and a remainder of 5.5e-08.