777974 ÷ 86 
The aim is to understand the frequency of 86 in 777974.

Step 1:
If we divide 7 by 86, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 86

Advancing to step 2:
If we divide 77 by 86, we get 0 and a remainder of 77.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Fetch the next digit (7) from the dividend, attach it to 77 and continue: 777 / 86

On to step 3:
86 can be fit into 777 9 times, resulting in a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 774 from 777 and we're left with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 86

Step 4:
86 can be fit into 39 0 times, resulting in a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 90.0
The remainder is 39 after subtracting 0 from 39.
Include the next digit (7) from the dividend after 39, then repeat: 397 / 86

Moving on to step 5:
The number 86 fits into 397 4 times, leaving a remainder of 53.
The number 4 becomes the next digit in our result. 
Result so far: 904.0
If we subtract 344 from 397, we get 53.
Grab the next digit (4) from the dividend, add it to 53, then carry on: 534 / 86

Step 6:
86 goes into 534 6 times with a remainder of 18.
The number 6 becomes the next digit in our result. 
Result so far: 9046.0
Subtract 516 from 534 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
The number 86 fits into 180 2 times, leaving a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 9046.2
Subtract 172 from 180 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 8:
The number 86 fits into 80 0 times, leaving a remainder of 80.
The next digit of our result is 0. 
Result so far: 9046.2
Subtracting 0 from 80 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 9:
86 can be fit into 800 9 times, resulting in a remainder of 26.
Use 9 as the next digit of our solution. 
Result so far: 9046.209
Deduct 774 from 800 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 10:
If we divide 260 by 86, we get 3 and a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 9046.2093
Subtracting 258 from 260 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 11:
86 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 9046.2093
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 12:
The number 86 fits into 200 2 times, leaving a remainder of 28.
The next digit of our result is 2. 
Result so far: 9046.209302
If we take 172 away from 200, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 13:
86 goes into 280 3 times with a remainder of 22.
Use 3 as the next digit of our solution. 
Result so far: 9046.2093023
If we subtract 258 from 280, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 14:
If we divide 220 by 86, we get 2 and a remainder of 48.
Use 2 as the next digit of our solution. 
Result so far: 9046.20930232
The remainder is 48 after subtracting 172 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final result is 9046.20930232 with a remainder of 4.8e-08.