We're dividing 90287521 by 608 
The aim is to understand the frequency of 608 in 90287521.

On to step 1:
If we divide 9 by 608, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 608

Step 2:
When dividing 90 by 608, we get 0 with a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Grab the next digit (2) from the dividend, add it to 90, then carry on: 902 / 608

Moving on to step 3:
608 goes into 902 1 times with a remainder of 294.
The next digit of our result is 1. 
Result so far: 1.0
If we take 608 away from 902, we end up with 294.
Fetch the next digit (8) from the dividend, attach it to 294 and continue: 2948 / 608

Moving on to step 4:
608 can be fit into 2948 4 times, resulting in a remainder of 516.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 2432 from 2948, we get 516.
Append the next digit (7) from the dividend to 516 and continue with: 5167 / 608

Going ahead to step 5:
608 can be fit into 5167 8 times, resulting in a remainder of 303.
Put 8 as the next digit of the answer. 
Result so far: 148.0
Deduct 4864 from 5167 and we're left with 303.
Take the next digit (5) from the dividend and append it to 303, then repeat: 3035 / 608

Moving on to step 6:
If we divide 3035 by 608, we get 4 and a remainder of 603.
The number 4 becomes the next digit in our result. 
Result so far: 1484.0
If we take 2432 away from 3035, we end up with 603.
Append the next digit (2) from the dividend to 603 and continue with: 6032 / 608

Let's proceed to step 7:
608 can be fit into 6032 9 times, resulting in a remainder of 560.
The next digit of our result is 9. 
Result so far: 14849.0
The remainder is 560 after subtracting 5472 from 6032.
Append the next digit (1) from the dividend to 560 and continue with: 5601 / 608

Let's proceed to step 8:
608 can be fit into 5601 9 times, resulting in a remainder of 129.
Write down 9 as next digit of the result. 
Result so far: 148499.0
Subtracting 5472 from 5601 leaves us with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Going ahead to step 9:
608 can be fit into 1290 2 times, resulting in a remainder of 74.
Use 2 as the next digit of our solution. 
Result so far: 148499.2
If we take 1216 away from 1290, we end up with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 10:
740 divided by 608 is 1 with a remainder of 132.
Write down 1 as next digit of the result. 
Result so far: 148499.21
The remainder is 132 after subtracting 608 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Advancing to step 11:
If we divide 1320 by 608, we get 2 and a remainder of 104.
Record the quotient 2 as the next digit in the result. 
Result so far: 148499.212
If we take 1216 away from 1320, we end up with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

On to step 12:
When dividing 1040 by 608, we get 1 with a remainder of 432.
The number 1 becomes the next digit in our result. 
Result so far: 148499.2121
If we subtract 608 from 1040, we get 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Step 13:
4320 divided by 608 is 7 with a remainder of 64.
The next digit of our result is 7. 
Result so far: 148499.21217
The remainder is 64 after subtracting 4256 from 4320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 14:
608 goes into 640 1 times with a remainder of 32.
Write down 1 as next digit of the result. 
Result so far: 148499.212171
Subtracting 608 from 640 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 15:
The number 608 fits into 320 0 times, leaving a remainder of 320.
Record the quotient 0 as the next digit in the result. 
Result so far: 148499.212171
Subtracting 0 from 320 leaves us with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 16:
608 goes into 3200 5 times with a remainder of 160.
The number 5 becomes the next digit in our result. 
Result so far: 148499.21217105
Deduct 3040 from 3200 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

The final outcome is 148499.21217105, with a leftover of 1.6e-07.