Let's divide 88521633 by 604
The aim is to understand the frequency of 604 in 88521633.

Step 1:
8 divided by 604 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 604

On to step 2:
88 divided by 604 is 0 with a remainder of 88.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 88 and we're left with 88.
Take the next digit (5) from the dividend and append it to 88, then repeat: 885 / 604

Advancing to step 3:
If we divide 885 by 604, we get 1 and a remainder of 281.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 604 from 885 to get 281.
Append the next digit (2) from the dividend to 281 and continue with: 2812 / 604

Let's proceed to step 4:
The number 604 fits into 2812 4 times, leaving a remainder of 396.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtracting 2416 from 2812 leaves us with 396.
Grab the next digit (1) from the dividend, add it to 396, then carry on: 3961 / 604

On to step 5:
604 can be fit into 3961 6 times, resulting in a remainder of 337.
The next digit of our result is 6. 
Result so far: 146.0
If we take 3624 away from 3961, we end up with 337.
Fetch the next digit (6) from the dividend, attach it to 337 and continue: 3376 / 604

Let's proceed to step 6:
3376 divided by 604 is 5 with a remainder of 356.
Put 5 as the next digit of the answer. 
Result so far: 1465.0
Subtracting 3020 from 3376 leaves us with 356.
Bring next digit (3) of the dividend behind the 356 and repeat the process: 3563 / 604

Step 7:
If we divide 3563 by 604, we get 5 and a remainder of 543.
Use 5 as the next digit of our solution. 
Result so far: 14655.0
Deduct 3020 from 3563 and we're left with 543.
Include the next digit (3) from the dividend after 543, then repeat: 5433 / 604

Advancing to step 8:
5433 divided by 604 is 8 with a remainder of 601.
Record the quotient 8 as the next digit in the result. 
Result so far: 146558.0
Subtract 4832 from 5433 to get 601.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6010, and continue the process.

On to step 9:
604 can be fit into 6010 9 times, resulting in a remainder of 574.
Write down 9 as next digit of the result. 
Result so far: 146558.9
If we subtract 5436 from 6010, we get 574.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5740, and continue the process.

Going ahead to step 10:
When dividing 5740 by 604, we get 9 with a remainder of 304.
Use 9 as the next digit of our solution. 
Result so far: 146558.99
Subtracting 5436 from 5740 leaves us with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

After the division, we end up with 146558.99 and a remainder of 0.304.