We're dividing 91890911 by 628 
The aim is to understand the frequency of 628 in 91890911.

Moving on to step 1:
628 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 628

On to step 2:
If we divide 91 by 628, we get 0 and a remainder of 91.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 91, we end up with 91.
Append the next digit (8) from the dividend to 91 and continue with: 918 / 628

Going ahead to step 3:
If we divide 918 by 628, we get 1 and a remainder of 290.
The next digit of our result is 1. 
Result so far: 1.0
If we take 628 away from 918, we end up with 290.
Include the next digit (9) from the dividend after 290, then repeat: 2909 / 628

Advancing to step 4:
If we divide 2909 by 628, we get 4 and a remainder of 397.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
If we subtract 2512 from 2909, we get 397.
Fetch the next digit (0) from the dividend, attach it to 397 and continue: 3970 / 628

On to step 5:
628 goes into 3970 6 times with a remainder of 202.
Use 6 as the next digit of our solution. 
Result so far: 146.0
The remainder is 202 after subtracting 3768 from 3970.
Grab the next digit (9) from the dividend, add it to 202, then carry on: 2029 / 628

Moving on to step 6:
2029 divided by 628 is 3 with a remainder of 145.
Use 3 as the next digit of our solution. 
Result so far: 1463.0
Subtract 1884 from 2029 to get 145.
Fetch the next digit (1) from the dividend, attach it to 145 and continue: 1451 / 628

Step 7:
If we divide 1451 by 628, we get 2 and a remainder of 195.
The next digit of our result is 2. 
Result so far: 14632.0
If we subtract 1256 from 1451, we get 195.
Take the next digit (1) from the dividend and append it to 195, then repeat: 1951 / 628

Let's proceed to step 8:
628 goes into 1951 3 times with a remainder of 67.
The number 3 becomes the next digit in our result. 
Result so far: 146323.0
If we take 1884 away from 1951, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 9:
When dividing 670 by 628, we get 1 with a remainder of 42.
The number 1 becomes the next digit in our result. 
Result so far: 146323.1
Subtracting 628 from 670 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 10:
The number 628 fits into 420 0 times, leaving a remainder of 420.
Use 0 as the next digit of our solution. 
Result so far: 146323.1
Subtract 0 from 420 to get 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Moving on to step 11:
628 can be fit into 4200 6 times, resulting in a remainder of 432.
Write down 6 as next digit of the result. 
Result so far: 146323.106
Deduct 3768 from 4200 and we're left with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Moving on to step 12:
4320 divided by 628 is 6 with a remainder of 552.
Record the quotient 6 as the next digit in the result. 
Result so far: 146323.1066
The remainder is 552 after subtracting 3768 from 4320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

After the division, we end up with 146323.1066 and a remainder of 0.00552.