We're dividing 90815275 by 579 
The aim is to understand the frequency of 579 in 90815275.

On to step 1:
If we divide 9 by 579, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 579

Step 2:
When dividing 90 by 579, we get 0 with a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Include the next digit (8) from the dividend after 90, then repeat: 908 / 579

Step 3:
When dividing 908 by 579, we get 1 with a remainder of 329.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 579 from 908 and we're left with 329.
Fetch the next digit (1) from the dividend, attach it to 329 and continue: 3291 / 579

On to step 4:
579 goes into 3291 5 times with a remainder of 396.
Use 5 as the next digit of our solution. 
Result so far: 15.0
If we take 2895 away from 3291, we end up with 396.
Take the next digit (5) from the dividend and append it to 396, then repeat: 3965 / 579

Going ahead to step 5:
If we divide 3965 by 579, we get 6 and a remainder of 491.
Put 6 as the next digit of the answer. 
Result so far: 156.0
Subtracting 3474 from 3965 leaves us with 491.
Bring next digit (2) of the dividend behind the 491 and repeat the process: 4912 / 579

Advancing to step 6:
When dividing 4912 by 579, we get 8 with a remainder of 280.
Write down 8 as next digit of the result. 
Result so far: 1568.0
The remainder is 280 after subtracting 4632 from 4912.
Include the next digit (7) from the dividend after 280, then repeat: 2807 / 579

Step 7:
579 goes into 2807 4 times with a remainder of 491.
Use 4 as the next digit of our solution. 
Result so far: 15684.0
If we subtract 2316 from 2807, we get 491.
Bring next digit (5) of the dividend behind the 491 and repeat the process: 4915 / 579

Going ahead to step 8:
579 can be fit into 4915 8 times, resulting in a remainder of 283.
The number 8 becomes the next digit in our result. 
Result so far: 156848.0
The remainder is 283 after subtracting 4632 from 4915.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2830, and continue the process.

Let's proceed to step 9:
579 can be fit into 2830 4 times, resulting in a remainder of 514.
The next digit of our result is 4. 
Result so far: 156848.4
Deduct 2316 from 2830 and we're left with 514.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5140, and continue the process.

On to step 10:
5140 divided by 579 is 8 with a remainder of 508.
Use 8 as the next digit of our solution. 
Result so far: 156848.48
If we take 4632 away from 5140, we end up with 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

Let's proceed to step 11:
The number 579 fits into 5080 8 times, leaving a remainder of 448.
Write down 8 as next digit of the result. 
Result so far: 156848.488
Subtract 4632 from 5080 to get 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

The quotient of the division is 156848.488, and the remainder is 0.0448.