We're dividing 53188291 by 900 
The aim is to understand the frequency of 900 in 53188291.

Step 1:
5 divided by 900 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 900

Moving on to step 2:
The number 900 fits into 53 0 times, leaving a remainder of 53.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Grab the next digit (1) from the dividend, add it to 53, then carry on: 531 / 900

Going ahead to step 3:
531 divided by 900 is 0 with a remainder of 531.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 531, we get 531.
Append the next digit (8) from the dividend to 531 and continue with: 5318 / 900

Moving on to step 4:
When dividing 5318 by 900, we get 5 with a remainder of 818.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Deduct 4500 from 5318 and we're left with 818.
Fetch the next digit (8) from the dividend, attach it to 818 and continue: 8188 / 900

Moving on to step 5:
When dividing 8188 by 900, we get 9 with a remainder of 88.
Write down 9 as next digit of the result. 
Result so far: 59.0
Subtracting 8100 from 8188 leaves us with 88.
Fetch the next digit (2) from the dividend, attach it to 88 and continue: 882 / 900

Advancing to step 6:
900 goes into 882 0 times with a remainder of 882.
Use 0 as the next digit of our solution. 
Result so far: 590.0
The remainder is 882 after subtracting 0 from 882.
Fetch the next digit (9) from the dividend, attach it to 882 and continue: 8829 / 900

On to step 7:
8829 divided by 900 is 9 with a remainder of 729.
Use 9 as the next digit of our solution. 
Result so far: 5909.0
Subtracting 8100 from 8829 leaves us with 729.
Fetch the next digit (1) from the dividend, attach it to 729 and continue: 7291 / 900

Step 8:
900 can be fit into 7291 8 times, resulting in a remainder of 91.
The next digit of our result is 8. 
Result so far: 59098.0
Subtract 7200 from 7291 to get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Let's proceed to step 9:
When dividing 910 by 900, we get 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 59098.1
Subtract 900 from 910 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 10:
The number 900 fits into 100 0 times, leaving a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 59098.1
Subtracting 0 from 100 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Moving on to step 11:
900 can be fit into 1000 1 times, resulting in a remainder of 100.
Write down 1 as next digit of the result. 
Result so far: 59098.101
Subtract 900 from 1000 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 12:
If we divide 1000 by 900, we get 1 and a remainder of 100.
Put 1 as the next digit of the answer. 
Result so far: 59098.1011
The remainder is 100 after subtracting 900 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

After the division, we end up with 59098.1011 and a remainder of 0.001.