858977 ÷ 17 
The aim is to understand the frequency of 17 in 858977.

Moving on to step 1:
17 goes into 8 0 times with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 17

On to step 2:
When dividing 85 by 17, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 85 from 85, we get 0.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 17

On to step 3:
If we divide 8 by 17, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 50.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 17

Moving on to step 4:
The number 17 fits into 89 5 times, leaving a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 505.0
If we take 85 away from 89, we end up with 4.
Take the next digit (7) from the dividend and append it to 4, then repeat: 47 / 17

Going ahead to step 5:
47 divided by 17 is 2 with a remainder of 13.
Record the quotient 2 as the next digit in the result. 
Result so far: 5052.0
Subtract 34 from 47 to get 13.
Fetch the next digit (7) from the dividend, attach it to 13 and continue: 137 / 17

Step 6:
When dividing 137 by 17, we get 8 with a remainder of 1.
Record the quotient 8 as the next digit in the result. 
Result so far: 50528.0
If we take 136 away from 137, 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.

Step 7:
When dividing 10 by 17, we get 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 50528.0
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.

Advancing to step 8:
The number 17 fits into 100 5 times, leaving a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 50528.05
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.

Step 9:
When dividing 150 by 17, we get 8 with a remainder of 14.
Put 8 as the next digit of the answer. 
Result so far: 50528.058
The remainder is 14 after subtracting 136 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 10:
17 goes into 140 8 times with a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 50528.0588
The remainder is 4 after subtracting 136 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 50528.0588, with a leftover of 4e-05.