We look at the division of 681088 by 45 
The aim is to understand the frequency of 45 in 681088.

Going ahead to step 1:
6 divided by 45 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 45

Step 2:
The number 45 fits into 68 1 times, leaving a remainder of 23.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 45 from 68, we get 23.
Append the next digit (1) from the dividend to 23 and continue with: 231 / 45

Going ahead to step 3:
If we divide 231 by 45, we get 5 and a remainder of 6.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Subtract 225 from 231 to get 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 45

Going ahead to step 4:
60 divided by 45 is 1 with a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 151.0
If we take 45 away from 60, we end up with 15.
Include the next digit (8) from the dividend after 15, then repeat: 158 / 45

Let's proceed to step 5:
45 can be fit into 158 3 times, resulting in a remainder of 23.
Use 3 as the next digit of our solution. 
Result so far: 1513.0
Deduct 135 from 158 and we're left with 23.
Include the next digit (8) from the dividend after 23, then repeat: 238 / 45

Moving on to step 6:
45 goes into 238 5 times with a remainder of 13.
The next digit of our result is 5. 
Result so far: 15135.0
The remainder is 13 after subtracting 225 from 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 7:
45 can be fit into 130 2 times, resulting in a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 15135.2
The remainder is 40 after subtracting 90 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 8:
45 can be fit into 400 8 times, resulting in a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 15135.28
The remainder is 40 after subtracting 360 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
If we divide 400 by 45, we get 8 and a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 15135.288
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final outcome is 15135.288, with a leftover of 0.004.