We look at the division of 43536977 by 873 
The aim is to understand the frequency of 873 in 43536977.

Moving on to step 1:
873 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 873

On to step 2:
If we divide 43 by 873, we get 0 and a remainder of 43.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 43, we get 43.
Append the next digit (5) from the dividend to 43 and continue with: 435 / 873

Let's proceed to step 3:
435 divided by 873 is 0 with a remainder of 435.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 435 after subtracting 0 from 435.
Fetch the next digit (3) from the dividend, attach it to 435 and continue: 4353 / 873

Going ahead to step 4:
If we divide 4353 by 873, we get 4 and a remainder of 861.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 3492 from 4353 and we're left with 861.
Fetch the next digit (6) from the dividend, attach it to 861 and continue: 8616 / 873

Let's proceed to step 5:
873 goes into 8616 9 times with a remainder of 759.
The next digit of our result is 9. 
Result so far: 49.0
The remainder is 759 after subtracting 7857 from 8616.
Bring next digit (9) of the dividend behind the 759 and repeat the process: 7599 / 873

Going ahead to step 6:
873 goes into 7599 8 times with a remainder of 615.
Record the quotient 8 as the next digit in the result. 
Result so far: 498.0
If we subtract 6984 from 7599, we get 615.
Include the next digit (7) from the dividend after 615, then repeat: 6157 / 873

On to step 7:
6157 divided by 873 is 7 with a remainder of 46.
Use 7 as the next digit of our solution. 
Result so far: 4987.0
The remainder is 46 after subtracting 6111 from 6157.
Grab the next digit (7) from the dividend, add it to 46, then carry on: 467 / 873

Going ahead to step 8:
The number 873 fits into 467 0 times, leaving a remainder of 467.
Use 0 as the next digit of our solution. 
Result so far: 49870.0
If we subtract 0 from 467, we get 467.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4670, and continue the process.

Let's proceed to step 9:
4670 divided by 873 is 5 with a remainder of 305.
Use 5 as the next digit of our solution. 
Result so far: 49870.5
Deduct 4365 from 4670 and we're left with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Advancing to step 10:
If we divide 3050 by 873, we get 3 and a remainder of 431.
Write down 3 as next digit of the result. 
Result so far: 49870.53
Deduct 2619 from 3050 and we're left with 431.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4310, and continue the process.

Let's proceed to step 11:
If we divide 4310 by 873, we get 4 and a remainder of 818.
Write down 4 as next digit of the result. 
Result so far: 49870.534
Subtract 3492 from 4310 to get 818.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8180, and continue the process.

Moving on to step 12:
873 goes into 8180 9 times with a remainder of 323.
Write down 9 as next digit of the result. 
Result so far: 49870.5349
Deduct 7857 from 8180 and we're left with 323.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3230, and continue the process.

On to step 13:
If we divide 3230 by 873, we get 3 and a remainder of 611.
Write down 3 as next digit of the result. 
Result so far: 49870.53493
The remainder is 611 after subtracting 2619 from 3230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6110, and continue the process.

Moving on to step 14:
If we divide 6110 by 873, we get 6 and a remainder of 872.
The number 6 becomes the next digit in our result. 
Result so far: 49870.534936
The remainder is 872 after subtracting 5238 from 6110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8720, and continue the process.

Advancing to step 15:
873 goes into 8720 9 times with a remainder of 863.
The number 9 becomes the next digit in our result. 
Result so far: 49870.5349369
If we take 7857 away from 8720, we end up with 863.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8630, and continue the process.

Moving on to step 16:
If we divide 8630 by 873, we get 9 and a remainder of 773.
Use 9 as the next digit of our solution. 
Result so far: 49870.53493699
Subtracting 7857 from 8630 leaves us with 773.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7730, and continue the process.

The final result is 49870.53493699 with a remainder of 7.73e-07.