We look at the division of 90788678 by 738 
The aim is to understand the frequency of 738 in 90788678.

On to step 1:
738 can be fit into 9 0 times, resulting in a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 738

Moving on to step 2:
If we divide 90 by 738, we get 0 and a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Bring next digit (7) of the dividend behind the 90 and repeat the process: 907 / 738

Advancing to step 3:
738 can be fit into 907 1 times, resulting in a remainder of 169.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 738 from 907 to get 169.
Append the next digit (8) from the dividend to 169 and continue with: 1698 / 738

Advancing to step 4:
The number 738 fits into 1698 2 times, leaving a remainder of 222.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we take 1476 away from 1698, we end up with 222.
Take the next digit (8) from the dividend and append it to 222, then repeat: 2228 / 738

Moving on to step 5:
The number 738 fits into 2228 3 times, leaving a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 123.0
Deduct 2214 from 2228 and we're left with 14.
Append the next digit (6) from the dividend to 14 and continue with: 146 / 738

Let's proceed to step 6:
738 can be fit into 146 0 times, resulting in a remainder of 146.
The next digit of our result is 0. 
Result so far: 1230.0
The remainder is 146 after subtracting 0 from 146.
Bring next digit (7) of the dividend behind the 146 and repeat the process: 1467 / 738

On to step 7:
If we divide 1467 by 738, we get 1 and a remainder of 729.
Record the quotient 1 as the next digit in the result. 
Result so far: 12301.0
If we subtract 738 from 1467, we get 729.
Include the next digit (8) from the dividend after 729, then repeat: 7298 / 738

Going ahead to step 8:
If we divide 7298 by 738, we get 9 and a remainder of 656.
The next digit of our result is 9. 
Result so far: 123019.0
If we subtract 6642 from 7298, we get 656.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

On to step 9:
738 goes into 6560 8 times with a remainder of 656.
Use 8 as the next digit of our solution. 
Result so far: 123019.8
Deduct 5904 from 6560 and we're left with 656.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

Moving on to step 10:
The number 738 fits into 6560 8 times, leaving a remainder of 656.
Write down 8 as next digit of the result. 
Result so far: 123019.88
Deduct 5904 from 6560 and we're left with 656.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

The final outcome is 123019.88, with a leftover of 0.656.