We're dividing 90903072 by 168 
The aim is to understand the frequency of 168 in 90903072.

Going ahead to step 1:
168 can be fit into 9 0 times, resulting in a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 168

Step 2:
When dividing 90 by 168, we get 0 with a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 90 leaves us with 90.
Append the next digit (9) from the dividend to 90 and continue with: 909 / 168

Advancing to step 3:
If we divide 909 by 168, we get 5 and a remainder of 69.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we subtract 840 from 909, we get 69.
Grab the next digit (0) from the dividend, add it to 69, then carry on: 690 / 168

On to step 4:
When dividing 690 by 168, we get 4 with a remainder of 18.
The next digit of our result is 4. 
Result so far: 54.0
If we subtract 672 from 690, we get 18.
Fetch the next digit (3) from the dividend, attach it to 18 and continue: 183 / 168

Let's proceed to step 5:
168 can be fit into 183 1 times, resulting in a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 541.0
If we subtract 168 from 183, we get 15.
Append the next digit (0) from the dividend to 15 and continue with: 150 / 168

Let's proceed to step 6:
168 can be fit into 150 0 times, resulting in a remainder of 150.
Use 0 as the next digit of our solution. 
Result so far: 5410.0
If we take 0 away from 150, we end up with 150.
Fetch the next digit (7) from the dividend, attach it to 150 and continue: 1507 / 168

Moving on to step 7:
When dividing 1507 by 168, we get 8 with a remainder of 163.
The number 8 becomes the next digit in our result. 
Result so far: 54108.0
Subtract 1344 from 1507 to get 163.
Fetch the next digit (2) from the dividend, attach it to 163 and continue: 1632 / 168

Moving on to step 8:
The number 168 fits into 1632 9 times, leaving a remainder of 120.
The next digit of our result is 9. 
Result so far: 541089.0
If we subtract 1512 from 1632, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 9:
1200 divided by 168 is 7 with a remainder of 24.
Write down 7 as next digit of the result. 
Result so far: 541089.7
If we take 1176 away from 1200, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 10:
If we divide 240 by 168, we get 1 and a remainder of 72.
Put 1 as the next digit of the answer. 
Result so far: 541089.71
If we subtract 168 from 240, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 11:
If we divide 720 by 168, we get 4 and a remainder of 48.
The number 4 becomes the next digit in our result. 
Result so far: 541089.714
The remainder is 48 after subtracting 672 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 12:
480 divided by 168 is 2 with a remainder of 144.
Put 2 as the next digit of the answer. 
Result so far: 541089.7142
Subtracting 336 from 480 leaves us with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Advancing to step 13:
When dividing 1440 by 168, we get 8 with a remainder of 96.
The number 8 becomes the next digit in our result. 
Result so far: 541089.71428
Deduct 1344 from 1440 and we're left with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Let's proceed to step 14:
When dividing 960 by 168, we get 5 with a remainder of 120.
The next digit of our result is 5. 
Result so far: 541089.714285
If we subtract 840 from 960, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 15:
168 can be fit into 1200 7 times, resulting in a remainder of 24.
Write down 7 as next digit of the result. 
Result so far: 541089.7142857
If we take 1176 away from 1200, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 16:
168 goes into 240 1 times with a remainder of 72.
Use 1 as the next digit of our solution. 
Result so far: 541089.71428571
Subtracting 168 from 240 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

The final result is 541089.71428571 with a remainder of 7.2e-08.