We look at the division of 168609 by 10 
The aim is to understand the frequency of 10 in 168609.

Advancing to step 1:
1 divided by 10 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 10

Step 2:
If we divide 16 by 10, we get 1 and a remainder of 6.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 10 from 16 and we're left with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 10

Going ahead to step 3:
If we divide 68 by 10, we get 6 and a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 16.0
Subtract 60 from 68 to get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 10

Going ahead to step 4:
10 can be fit into 86 8 times, resulting in a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 168.0
Subtracting 80 from 86 leaves us with 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 10

Step 5:
If we divide 60 by 10, we get 6 and a remainder of 0.
The next digit of our result is 6. 
Result so far: 1686.0
Subtract 60 from 60 to get 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 10

Advancing to step 6:
When dividing 9 by 10, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 16860.0
Subtracting 0 from 9 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
If we divide 90 by 10, we get 9 and a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 16860.9
The remainder is 0 after subtracting 90 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
10 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 16860.9
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
0 divided by 10 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 16860.9
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 16860.9 with a remaining 0.0.