90521443 divided by 854 
The aim is to understand the frequency of 854 in 90521443.

Step 1:
If we divide 9 by 854, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 854

Step 2:
If we divide 90 by 854, we get 0 and a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 90 to get 90.
Append the next digit (5) from the dividend to 90 and continue with: 905 / 854

Let's proceed to step 3:
905 divided by 854 is 1 with a remainder of 51.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 854 from 905 leaves us with 51.
Fetch the next digit (2) from the dividend, attach it to 51 and continue: 512 / 854

Moving on to step 4:
512 divided by 854 is 0 with a remainder of 512.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 512 leaves us with 512.
Grab the next digit (1) from the dividend, add it to 512, then carry on: 5121 / 854

Let's proceed to step 5:
If we divide 5121 by 854, we get 5 and a remainder of 851.
Record the quotient 5 as the next digit in the result. 
Result so far: 105.0
The remainder is 851 after subtracting 4270 from 5121.
Fetch the next digit (4) from the dividend, attach it to 851 and continue: 8514 / 854

On to step 6:
When dividing 8514 by 854, we get 9 with a remainder of 828.
Use 9 as the next digit of our solution. 
Result so far: 1059.0
Subtracting 7686 from 8514 leaves us with 828.
Include the next digit (4) from the dividend after 828, then repeat: 8284 / 854

Step 7:
The number 854 fits into 8284 9 times, leaving a remainder of 598.
Put 9 as the next digit of the answer. 
Result so far: 10599.0
The remainder is 598 after subtracting 7686 from 8284.
Include the next digit (3) from the dividend after 598, then repeat: 5983 / 854

On to step 8:
If we divide 5983 by 854, we get 7 and a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 105997.0
Subtract 5978 from 5983 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 9:
If we divide 50 by 854, we get 0 and a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 105997.0
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 10:
500 divided by 854 is 0 with a remainder of 500.
Write down 0 as next digit of the result. 
Result so far: 105997.0
Subtracting 0 from 500 leaves us with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Our division results in 105997.0 with a remaining 0.5.