81864495 ÷ 439 
The aim is to understand the frequency of 439 in 81864495.

Let's proceed to step 1:
When dividing 8 by 439, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 439

Moving on to step 2:
81 divided by 439 is 0 with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Grab the next digit (8) from the dividend, add it to 81, then carry on: 818 / 439

Let's proceed to step 3:
The number 439 fits into 818 1 times, leaving a remainder of 379.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 439 from 818 leaves us with 379.
Include the next digit (6) from the dividend after 379, then repeat: 3796 / 439

Advancing to step 4:
439 goes into 3796 8 times with a remainder of 284.
Put 8 as the next digit of the answer. 
Result so far: 18.0
If we take 3512 away from 3796, we end up with 284.
Take the next digit (4) from the dividend and append it to 284, then repeat: 2844 / 439

Step 5:
439 can be fit into 2844 6 times, resulting in a remainder of 210.
The next digit of our result is 6. 
Result so far: 186.0
The remainder is 210 after subtracting 2634 from 2844.
Append the next digit (4) from the dividend to 210 and continue with: 2104 / 439

Moving on to step 6:
If we divide 2104 by 439, we get 4 and a remainder of 348.
The number 4 becomes the next digit in our result. 
Result so far: 1864.0
Deduct 1756 from 2104 and we're left with 348.
Fetch the next digit (9) from the dividend, attach it to 348 and continue: 3489 / 439

Advancing to step 7:
3489 divided by 439 is 7 with a remainder of 416.
Write down 7 as next digit of the result. 
Result so far: 18647.0
Deduct 3073 from 3489 and we're left with 416.
Grab the next digit (5) from the dividend, add it to 416, then carry on: 4165 / 439

On to step 8:
The number 439 fits into 4165 9 times, leaving a remainder of 214.
Record the quotient 9 as the next digit in the result. 
Result so far: 186479.0
The remainder is 214 after subtracting 3951 from 4165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Going ahead to step 9:
439 goes into 2140 4 times with a remainder of 384.
The number 4 becomes the next digit in our result. 
Result so far: 186479.4
If we subtract 1756 from 2140, we get 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Let's proceed to step 10:
3840 divided by 439 is 8 with a remainder of 328.
The number 8 becomes the next digit in our result. 
Result so far: 186479.48
Subtracting 3512 from 3840 leaves us with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Going ahead to step 11:
3280 divided by 439 is 7 with a remainder of 207.
Put 7 as the next digit of the answer. 
Result so far: 186479.487
Subtract 3073 from 3280 to get 207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2070, and continue the process.

Moving on to step 12:
2070 divided by 439 is 4 with a remainder of 314.
Record the quotient 4 as the next digit in the result. 
Result so far: 186479.4874
The remainder is 314 after subtracting 1756 from 2070.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Let's proceed to step 13:
439 can be fit into 3140 7 times, resulting in a remainder of 67.
Use 7 as the next digit of our solution. 
Result so far: 186479.48747
The remainder is 67 after subtracting 3073 from 3140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 14:
439 goes into 670 1 times with a remainder of 231.
Record the quotient 1 as the next digit in the result. 
Result so far: 186479.487471
If we take 439 away from 670, we end up with 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Moving on to step 15:
The number 439 fits into 2310 5 times, leaving a remainder of 115.
The number 5 becomes the next digit in our result. 
Result so far: 186479.4874715
If we take 2195 away from 2310, we end up with 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Let's proceed to step 16:
The number 439 fits into 1150 2 times, leaving a remainder of 272.
The number 2 becomes the next digit in our result. 
Result so far: 186479.48747152
The remainder is 272 after subtracting 878 from 1150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Our division results in 186479.48747152 with a remaining 2.72e-07.