990447 ÷ 13 
The aim is to understand the frequency of 13 in 990447.

On to step 1:
13 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 13

Step 2:
13 goes into 99 7 times with a remainder of 8.
Write down 7 as next digit of the result. 
Result so far: 7.0
The remainder is 8 after subtracting 91 from 99.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 13

Advancing to step 3:
When dividing 80 by 13, we get 6 with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 76.0
Subtract 78 from 80 to get 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 13

Let's proceed to step 4:
13 can be fit into 24 1 times, resulting in a remainder of 11.
The next digit of our result is 1. 
Result so far: 761.0
Subtract 13 from 24 to get 11.
Take the next digit (4) from the dividend and append it to 11, then repeat: 114 / 13

Step 5:
If we divide 114 by 13, we get 8 and a remainder of 10.
Write down 8 as next digit of the result. 
Result so far: 7618.0
Deduct 104 from 114 and we're left with 10.
Grab the next digit (7) from the dividend, add it to 10, then carry on: 107 / 13

Advancing to step 6:
The number 13 fits into 107 8 times, leaving a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 76188.0
The remainder is 3 after subtracting 104 from 107.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 7:
The number 13 fits into 30 2 times, leaving a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 76188.2
If we subtract 26 from 30, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 8:
13 can be fit into 40 3 times, resulting in a remainder of 1.
The next digit of our result is 3. 
Result so far: 76188.23
If we take 39 away from 40, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
13 can be fit into 10 0 times, resulting in a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 76188.23
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
13 goes into 100 7 times with a remainder of 9.
The next digit of our result is 7. 
Result so far: 76188.2307
If we subtract 91 from 100, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 11:
If we divide 90 by 13, we get 6 and a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 76188.23076
If we subtract 78 from 90, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 12:
If we divide 120 by 13, we get 9 and a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 76188.230769
The remainder is 3 after subtracting 117 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 13:
30 divided by 13 is 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 76188.2307692
Subtracting 26 from 30 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 14:
13 goes into 40 3 times with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 76188.23076923
If we take 39 away from 40, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

After the division, we end up with 76188.23076923 and a remainder of 1e-09.