We divide 90318521 by 486
The aim is to understand the frequency of 486 in 90318521.

Advancing to step 1:
If we divide 9 by 486, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 486

On to step 2:
If we divide 90 by 486, we get 0 and a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 90 after subtracting 0 from 90.
Include the next digit (3) from the dividend after 90, then repeat: 903 / 486

On to step 3:
486 goes into 903 1 times with a remainder of 417.
The next digit of our result is 1. 
Result so far: 1.0
If we take 486 away from 903, we end up with 417.
Grab the next digit (1) from the dividend, add it to 417, then carry on: 4171 / 486

Let's proceed to step 4:
486 can be fit into 4171 8 times, resulting in a remainder of 283.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
Subtracting 3888 from 4171 leaves us with 283.
Bring next digit (8) of the dividend behind the 283 and repeat the process: 2838 / 486

On to step 5:
The number 486 fits into 2838 5 times, leaving a remainder of 408.
Put 5 as the next digit of the answer. 
Result so far: 185.0
If we take 2430 away from 2838, we end up with 408.
Include the next digit (5) from the dividend after 408, then repeat: 4085 / 486

Let's proceed to step 6:
The number 486 fits into 4085 8 times, leaving a remainder of 197.
Put 8 as the next digit of the answer. 
Result so far: 1858.0
If we subtract 3888 from 4085, we get 197.
Take the next digit (2) from the dividend and append it to 197, then repeat: 1972 / 486

Advancing to step 7:
If we divide 1972 by 486, we get 4 and a remainder of 28.
The number 4 becomes the next digit in our result. 
Result so far: 18584.0
If we subtract 1944 from 1972, we get 28.
Append the next digit (1) from the dividend to 28 and continue with: 281 / 486

Step 8:
486 can be fit into 281 0 times, resulting in a remainder of 281.
Record the quotient 0 as the next digit in the result. 
Result so far: 185840.0
Deduct 0 from 281 and we're left with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Advancing to step 9:
When dividing 2810 by 486, we get 5 with a remainder of 380.
Use 5 as the next digit of our solution. 
Result so far: 185840.5
Subtracting 2430 from 2810 leaves us with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

On to step 10:
When dividing 3800 by 486, we get 7 with a remainder of 398.
Use 7 as the next digit of our solution. 
Result so far: 185840.57
Deduct 3402 from 3800 and we're left with 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Moving on to step 11:
486 can be fit into 3980 8 times, resulting in a remainder of 92.
The number 8 becomes the next digit in our result. 
Result so far: 185840.578
Subtract 3888 from 3980 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Moving on to step 12:
When dividing 920 by 486, we get 1 with a remainder of 434.
Write down 1 as next digit of the result. 
Result so far: 185840.5781
Deduct 486 from 920 and we're left with 434.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4340, and continue the process.

On to step 13:
486 can be fit into 4340 8 times, resulting in a remainder of 452.
Put 8 as the next digit of the answer. 
Result so far: 185840.57818
The remainder is 452 after subtracting 3888 from 4340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Going ahead to step 14:
486 goes into 4520 9 times with a remainder of 146.
Record the quotient 9 as the next digit in the result. 
Result so far: 185840.578189
Deduct 4374 from 4520 and we're left with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Moving on to step 15:
1460 divided by 486 is 3 with a remainder of 2.
The next digit of our result is 3. 
Result so far: 185840.5781893
Subtract 1458 from 1460 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 16:
20 divided by 486 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 185840.5781893
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 185840.5781893, with a leftover of 2e-08.