We're dividing 91090491 by 723 
The aim is to understand the frequency of 723 in 91090491.

Moving on to step 1:
If we divide 9 by 723, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 723

Moving on to step 2:
723 goes into 91 0 times with a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 91 after subtracting 0 from 91.
Include the next digit (0) from the dividend after 91, then repeat: 910 / 723

Let's proceed to step 3:
723 goes into 910 1 times with a remainder of 187.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 723 from 910 leaves us with 187.
Bring next digit (9) of the dividend behind the 187 and repeat the process: 1879 / 723

Moving on to step 4:
723 can be fit into 1879 2 times, resulting in a remainder of 433.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtract 1446 from 1879 to get 433.
Grab the next digit (0) from the dividend, add it to 433, then carry on: 4330 / 723

Let's proceed to step 5:
The number 723 fits into 4330 5 times, leaving a remainder of 715.
The next digit of our result is 5. 
Result so far: 125.0
If we take 3615 away from 4330, we end up with 715.
Grab the next digit (4) from the dividend, add it to 715, then carry on: 7154 / 723

Let's proceed to step 6:
If we divide 7154 by 723, we get 9 and a remainder of 647.
The number 9 becomes the next digit in our result. 
Result so far: 1259.0
If we take 6507 away from 7154, we end up with 647.
Take the next digit (9) from the dividend and append it to 647, then repeat: 6479 / 723

Going ahead to step 7:
If we divide 6479 by 723, we get 8 and a remainder of 695.
The number 8 becomes the next digit in our result. 
Result so far: 12598.0
If we take 5784 away from 6479, we end up with 695.
Grab the next digit (1) from the dividend, add it to 695, then carry on: 6951 / 723

Going ahead to step 8:
If we divide 6951 by 723, we get 9 and a remainder of 444.
Record the quotient 9 as the next digit in the result. 
Result so far: 125989.0
Subtracting 6507 from 6951 leaves us with 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Moving on to step 9:
If we divide 4440 by 723, we get 6 and a remainder of 102.
The number 6 becomes the next digit in our result. 
Result so far: 125989.6
The remainder is 102 after subtracting 4338 from 4440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Going ahead to step 10:
If we divide 1020 by 723, we get 1 and a remainder of 297.
The next digit of our result is 1. 
Result so far: 125989.61
Subtract 723 from 1020 to get 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

Let's proceed to step 11:
If we divide 2970 by 723, we get 4 and a remainder of 78.
The next digit of our result is 4. 
Result so far: 125989.614
Subtract 2892 from 2970 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Advancing to step 12:
When dividing 780 by 723, we get 1 with a remainder of 57.
The next digit of our result is 1. 
Result so far: 125989.6141
The remainder is 57 after subtracting 723 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 13:
If we divide 570 by 723, we get 0 and a remainder of 570.
The number 0 becomes the next digit in our result. 
Result so far: 125989.6141
Subtracting 0 from 570 leaves us with 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Moving on to step 14:
723 can be fit into 5700 7 times, resulting in a remainder of 639.
The number 7 becomes the next digit in our result. 
Result so far: 125989.614107
If we take 5061 away from 5700, we end up with 639.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6390, and continue the process.

Step 15:
723 goes into 6390 8 times with a remainder of 606.
The number 8 becomes the next digit in our result. 
Result so far: 125989.6141078
Subtracting 5784 from 6390 leaves us with 606.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

Going ahead to step 16:
6060 divided by 723 is 8 with a remainder of 276.
Use 8 as the next digit of our solution. 
Result so far: 125989.61410788
The remainder is 276 after subtracting 5784 from 6060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

The final outcome is 125989.61410788, with a leftover of 2.76e-07.