665559 divided by 10 
The aim is to understand the frequency of 10 in 665559.

Step 1:
The number 10 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 10

Advancing to step 2:
66 divided by 10 is 6 with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtract 60 from 66 to get 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 10

Step 3:
When dividing 65 by 10, we get 6 with a remainder of 5.
The number 6 becomes the next digit in our result. 
Result so far: 66.0
If we subtract 60 from 65, we get 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 10

Step 4:
If we divide 55 by 10, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 665.0
Subtracting 50 from 55 leaves us with 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 10

Step 5:
If we divide 55 by 10, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 6655.0
Subtract 50 from 55 to get 5.
Bring next digit (9) of the dividend behind the 5 and repeat the process: 59 / 10

Step 6:
10 can be fit into 59 5 times, resulting in a remainder of 9.
Record the quotient 5 as the next digit in the result. 
Result so far: 66555.0
If we take 50 away from 59, we end up 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.

On to step 7:
90 divided by 10 is 9 with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 66555.9
If we subtract 90 from 90, 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.

Moving on to step 8:
10 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 66555.9
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.

Step 9:
The number 10 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 66555.9
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 66555.9 and a remainder of 0.0.