Let's divide 90539515 by 873
The aim is to understand the frequency of 873 in 90539515.

Going ahead to step 1:
873 can be fit into 9 0 times, resulting in a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 873

Step 2:
873 goes into 90 0 times with a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 90 after subtracting 0 from 90.
Grab the next digit (5) from the dividend, add it to 90, then carry on: 905 / 873

Moving on to step 3:
873 goes into 905 1 times with a remainder of 32.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 32 after subtracting 873 from 905.
Bring next digit (3) of the dividend behind the 32 and repeat the process: 323 / 873

Step 4:
The number 873 fits into 323 0 times, leaving a remainder of 323.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtract 0 from 323 to get 323.
Take the next digit (9) from the dividend and append it to 323, then repeat: 3239 / 873

On to step 5:
When dividing 3239 by 873, we get 3 with a remainder of 620.
The number 3 becomes the next digit in our result. 
Result so far: 103.0
If we take 2619 away from 3239, we end up with 620.
Include the next digit (5) from the dividend after 620, then repeat: 6205 / 873

Step 6:
The number 873 fits into 6205 7 times, leaving a remainder of 94.
Use 7 as the next digit of our solution. 
Result so far: 1037.0
The remainder is 94 after subtracting 6111 from 6205.
Bring next digit (1) of the dividend behind the 94 and repeat the process: 941 / 873

Going ahead to step 7:
If we divide 941 by 873, we get 1 and a remainder of 68.
The next digit of our result is 1. 
Result so far: 10371.0
If we take 873 away from 941, we end up with 68.
Take the next digit (5) from the dividend and append it to 68, then repeat: 685 / 873

Step 8:
When dividing 685 by 873, we get 0 with a remainder of 685.
The number 0 becomes the next digit in our result. 
Result so far: 103710.0
Subtracting 0 from 685 leaves us with 685.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6850, and continue the process.

On to step 9:
If we divide 6850 by 873, we get 7 and a remainder of 739.
Put 7 as the next digit of the answer. 
Result so far: 103710.7
Subtract 6111 from 6850 to get 739.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7390, and continue the process.

Going ahead to step 10:
If we divide 7390 by 873, we get 8 and a remainder of 406.
Record the quotient 8 as the next digit in the result. 
Result so far: 103710.78
Subtracting 6984 from 7390 leaves us with 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

Let's proceed to step 11:
If we divide 4060 by 873, we get 4 and a remainder of 568.
Put 4 as the next digit of the answer. 
Result so far: 103710.784
Deduct 3492 from 4060 and we're left with 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Going ahead to step 12:
The number 873 fits into 5680 6 times, leaving a remainder of 442.
The next digit of our result is 6. 
Result so far: 103710.7846
If we take 5238 away from 5680, we end up with 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Let's proceed to step 13:
The number 873 fits into 4420 5 times, leaving a remainder of 55.
Record the quotient 5 as the next digit in the result. 
Result so far: 103710.78465
If we subtract 4365 from 4420, we get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 14:
If we divide 550 by 873, we get 0 and a remainder of 550.
Put 0 as the next digit of the answer. 
Result so far: 103710.78465
If we take 0 away from 550, we end up with 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

Going ahead to step 15:
873 can be fit into 5500 6 times, resulting in a remainder of 262.
Write down 6 as next digit of the result. 
Result so far: 103710.7846506
Subtracting 5238 from 5500 leaves us with 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Let's proceed to step 16:
2620 divided by 873 is 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 103710.78465063
Subtract 2619 from 2620 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The quotient of the division is 103710.78465063, and the remainder is 1e-09.