We look at the division of 90486486 by 845 
The aim is to understand the frequency of 845 in 90486486.

Moving on to step 1:
9 divided by 845 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 845

Going ahead to step 2:
If we divide 90 by 845, we get 0 and a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 90 leaves us with 90.
Grab the next digit (4) from the dividend, add it to 90, then carry on: 904 / 845

Let's proceed to step 3:
If we divide 904 by 845, we get 1 and a remainder of 59.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 59 after subtracting 845 from 904.
Grab the next digit (8) from the dividend, add it to 59, then carry on: 598 / 845

Advancing to step 4:
The number 845 fits into 598 0 times, leaving a remainder of 598.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 598 leaves us with 598.
Bring next digit (6) of the dividend behind the 598 and repeat the process: 5986 / 845

Moving on to step 5:
When dividing 5986 by 845, we get 7 with a remainder of 71.
The next digit of our result is 7. 
Result so far: 107.0
If we take 5915 away from 5986, we end up with 71.
Include the next digit (4) from the dividend after 71, then repeat: 714 / 845

On to step 6:
When dividing 714 by 845, we get 0 with a remainder of 714.
Put 0 as the next digit of the answer. 
Result so far: 1070.0
Subtract 0 from 714 to get 714.
Bring next digit (8) of the dividend behind the 714 and repeat the process: 7148 / 845

Going ahead to step 7:
When dividing 7148 by 845, we get 8 with a remainder of 388.
Write down 8 as next digit of the result. 
Result so far: 10708.0
Subtract 6760 from 7148 to get 388.
Include the next digit (6) from the dividend after 388, then repeat: 3886 / 845

Advancing to step 8:
845 can be fit into 3886 4 times, resulting in a remainder of 506.
Put 4 as the next digit of the answer. 
Result so far: 107084.0
Subtract 3380 from 3886 to get 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

Advancing to step 9:
845 goes into 5060 5 times with a remainder of 835.
Use 5 as the next digit of our solution. 
Result so far: 107084.5
If we take 4225 away from 5060, we end up with 835.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8350, and continue the process.

Going ahead to step 10:
When dividing 8350 by 845, we get 9 with a remainder of 745.
Put 9 as the next digit of the answer. 
Result so far: 107084.59
Deduct 7605 from 8350 and we're left with 745.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7450, and continue the process.

On to step 11:
7450 divided by 845 is 8 with a remainder of 690.
The number 8 becomes the next digit in our result. 
Result so far: 107084.598
If we subtract 6760 from 7450, we get 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6900, and continue the process.

Advancing to step 12:
6900 divided by 845 is 8 with a remainder of 140.
Write down 8 as next digit of the result. 
Result so far: 107084.5988
Subtract 6760 from 6900 to get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

After the division, we end up with 107084.5988 and a remainder of 0.0014.