639711 ÷ 17 
The aim is to understand the frequency of 17 in 639711.

Advancing to step 1:
If we divide 6 by 17, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 17

On to step 2:
The number 17 fits into 63 3 times, leaving a remainder of 12.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 51 from 63, we get 12.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 17

Advancing to step 3:
129 divided by 17 is 7 with a remainder of 10.
The next digit of our result is 7. 
Result so far: 37.0
If we subtract 119 from 129, we get 10.
Include the next digit (7) from the dividend after 10, then repeat: 107 / 17

Going ahead to step 4:
If we divide 107 by 17, we get 6 and a remainder of 5.
Put 6 as the next digit of the answer. 
Result so far: 376.0
The remainder is 5 after subtracting 102 from 107.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 17

On to step 5:
If we divide 51 by 17, we get 3 and a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 3763.0
If we subtract 51 from 51, we get 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 17

Going ahead to step 6:
17 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 37630.0
Deduct 0 from 1 and we're left 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.

Moving on to step 7:
The number 17 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 37630.0
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
17 can be fit into 100 5 times, resulting in a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 37630.05
Subtract 85 from 100 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 9:
If we divide 150 by 17, we get 8 and a remainder of 14.
Put 8 as the next digit of the answer. 
Result so far: 37630.058
If we take 136 away from 150, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 10:
If we divide 140 by 17, we get 8 and a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 37630.0588
If we subtract 136 from 140, 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.

After the division, we end up with 37630.0588 and a remainder of 4e-05.