85105979 ÷ 621 
The aim is to understand the frequency of 621 in 85105979.

Moving on to step 1:
The number 621 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 621

Advancing to step 2:
The number 621 fits into 85 0 times, leaving a remainder of 85.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 85 to get 85.
Fetch the next digit (1) from the dividend, attach it to 85 and continue: 851 / 621

Step 3:
621 can be fit into 851 1 times, resulting in a remainder of 230.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 621 from 851 leaves us with 230.
Grab the next digit (0) from the dividend, add it to 230, then carry on: 2300 / 621

Step 4:
621 can be fit into 2300 3 times, resulting in a remainder of 437.
Use 3 as the next digit of our solution. 
Result so far: 13.0
The remainder is 437 after subtracting 1863 from 2300.
Bring next digit (5) of the dividend behind the 437 and repeat the process: 4375 / 621

Going ahead to step 5:
4375 divided by 621 is 7 with a remainder of 28.
Write down 7 as next digit of the result. 
Result so far: 137.0
Deduct 4347 from 4375 and we're left with 28.
Bring next digit (9) of the dividend behind the 28 and repeat the process: 289 / 621

On to step 6:
621 goes into 289 0 times with a remainder of 289.
Use 0 as the next digit of our solution. 
Result so far: 1370.0
The remainder is 289 after subtracting 0 from 289.
Grab the next digit (7) from the dividend, add it to 289, then carry on: 2897 / 621

Going ahead to step 7:
2897 divided by 621 is 4 with a remainder of 413.
Use 4 as the next digit of our solution. 
Result so far: 13704.0
If we subtract 2484 from 2897, we get 413.
Include the next digit (9) from the dividend after 413, then repeat: 4139 / 621

On to step 8:
If we divide 4139 by 621, we get 6 and a remainder of 413.
Use 6 as the next digit of our solution. 
Result so far: 137046.0
Subtract 3726 from 4139 to get 413.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4130, and continue the process.

Advancing to step 9:
The number 621 fits into 4130 6 times, leaving a remainder of 404.
Record the quotient 6 as the next digit in the result. 
Result so far: 137046.6
If we take 3726 away from 4130, we end up with 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Going ahead to step 10:
The number 621 fits into 4040 6 times, leaving a remainder of 314.
Use 6 as the next digit of our solution. 
Result so far: 137046.66
The remainder is 314 after subtracting 3726 from 4040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Our division results in 137046.66 with a remaining 0.314.