We look at the division of 90435009 by 461 
The aim is to understand the frequency of 461 in 90435009.

Moving on to step 1:
461 can be fit into 9 0 times, resulting in a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 461

Step 2:
461 can be fit into 90 0 times, resulting in a remainder of 90.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Bring next digit (4) of the dividend behind the 90 and repeat the process: 904 / 461

On to step 3:
461 can be fit into 904 1 times, resulting in a remainder of 443.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 461 from 904 and we're left with 443.
Bring next digit (3) of the dividend behind the 443 and repeat the process: 4433 / 461

Advancing to step 4:
The number 461 fits into 4433 9 times, leaving a remainder of 284.
The next digit of our result is 9. 
Result so far: 19.0
Subtract 4149 from 4433 to get 284.
Grab the next digit (5) from the dividend, add it to 284, then carry on: 2845 / 461

Let's proceed to step 5:
461 goes into 2845 6 times with a remainder of 79.
Put 6 as the next digit of the answer. 
Result so far: 196.0
Subtract 2766 from 2845 to get 79.
Append the next digit (0) from the dividend to 79 and continue with: 790 / 461

Moving on to step 6:
790 divided by 461 is 1 with a remainder of 329.
The next digit of our result is 1. 
Result so far: 1961.0
Deduct 461 from 790 and we're left with 329.
Append the next digit (0) from the dividend to 329 and continue with: 3290 / 461

Moving on to step 7:
461 goes into 3290 7 times with a remainder of 63.
Use 7 as the next digit of our solution. 
Result so far: 19617.0
Subtract 3227 from 3290 to get 63.
Take the next digit (9) from the dividend and append it to 63, then repeat: 639 / 461

Going ahead to step 8:
The number 461 fits into 639 1 times, leaving a remainder of 178.
Use 1 as the next digit of our solution. 
Result so far: 196171.0
Subtracting 461 from 639 leaves us with 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Let's proceed to step 9:
461 goes into 1780 3 times with a remainder of 397.
The number 3 becomes the next digit in our result. 
Result so far: 196171.3
Subtracting 1383 from 1780 leaves us with 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Advancing to step 10:
The number 461 fits into 3970 8 times, leaving a remainder of 282.
The number 8 becomes the next digit in our result. 
Result so far: 196171.38
The remainder is 282 after subtracting 3688 from 3970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Advancing to step 11:
When dividing 2820 by 461, we get 6 with a remainder of 54.
The number 6 becomes the next digit in our result. 
Result so far: 196171.386
Deduct 2766 from 2820 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 12:
461 can be fit into 540 1 times, resulting in a remainder of 79.
The number 1 becomes the next digit in our result. 
Result so far: 196171.3861
Subtracting 461 from 540 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

On to step 13:
The number 461 fits into 790 1 times, leaving a remainder of 329.
The next digit of our result is 1. 
Result so far: 196171.38611
Subtracting 461 from 790 leaves us with 329.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3290, and continue the process.

The final result is 196171.38611 with a remainder of 0.000329.