We're dividing 43909731 by 819 
The aim is to understand the frequency of 819 in 43909731.

Advancing to step 1:
819 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 819

Going ahead to step 2:
If we divide 43 by 819, we get 0 and a remainder of 43.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Take the next digit (9) from the dividend and append it to 43, then repeat: 439 / 819

Let's proceed to step 3:
The number 819 fits into 439 0 times, leaving a remainder of 439.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 439 to get 439.
Bring next digit (0) of the dividend behind the 439 and repeat the process: 4390 / 819

Step 4:
If we divide 4390 by 819, we get 5 and a remainder of 295.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtract 4095 from 4390 to get 295.
Fetch the next digit (9) from the dividend, attach it to 295 and continue: 2959 / 819

Step 5:
819 can be fit into 2959 3 times, resulting in a remainder of 502.
Put 3 as the next digit of the answer. 
Result so far: 53.0
Subtracting 2457 from 2959 leaves us with 502.
Include the next digit (7) from the dividend after 502, then repeat: 5027 / 819

On to step 6:
819 can be fit into 5027 6 times, resulting in a remainder of 113.
The next digit of our result is 6. 
Result so far: 536.0
Deduct 4914 from 5027 and we're left with 113.
Fetch the next digit (3) from the dividend, attach it to 113 and continue: 1133 / 819

Going ahead to step 7:
819 can be fit into 1133 1 times, resulting in a remainder of 314.
The next digit of our result is 1. 
Result so far: 5361.0
Subtract 819 from 1133 to get 314.
Append the next digit (1) from the dividend to 314 and continue with: 3141 / 819

Advancing to step 8:
819 goes into 3141 3 times with a remainder of 684.
The number 3 becomes the next digit in our result. 
Result so far: 53613.0
Subtracting 2457 from 3141 leaves us with 684.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6840, and continue the process.

Let's proceed to step 9:
The number 819 fits into 6840 8 times, leaving a remainder of 288.
The number 8 becomes the next digit in our result. 
Result so far: 53613.8
Deduct 6552 from 6840 and we're left with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Moving on to step 10:
If we divide 2880 by 819, we get 3 and a remainder of 423.
Record the quotient 3 as the next digit in the result. 
Result so far: 53613.83
Subtract 2457 from 2880 to get 423.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4230, and continue the process.

Step 11:
819 can be fit into 4230 5 times, resulting in a remainder of 135.
Use 5 as the next digit of our solution. 
Result so far: 53613.835
If we subtract 4095 from 4230, we get 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Advancing to step 12:
1350 divided by 819 is 1 with a remainder of 531.
Record the quotient 1 as the next digit in the result. 
Result so far: 53613.8351
Deduct 819 from 1350 and we're left with 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Going ahead to step 13:
819 can be fit into 5310 6 times, resulting in a remainder of 396.
The next digit of our result is 6. 
Result so far: 53613.83516
The remainder is 396 after subtracting 4914 from 5310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Step 14:
If we divide 3960 by 819, we get 4 and a remainder of 684.
Put 4 as the next digit of the answer. 
Result so far: 53613.835164
Subtracting 3276 from 3960 leaves us with 684.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6840, and continue the process.

On to step 15:
819 can be fit into 6840 8 times, resulting in a remainder of 288.
The number 8 becomes the next digit in our result. 
Result so far: 53613.8351648
The remainder is 288 after subtracting 6552 from 6840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Advancing to step 16:
When dividing 2880 by 819, we get 3 with a remainder of 423.
The next digit of our result is 3. 
Result so far: 53613.83516483
Subtract 2457 from 2880 to get 423.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4230, and continue the process.

The final result is 53613.83516483 with a remainder of 4.23e-07.