We're dividing 61853970 by 900 
The aim is to understand the frequency of 900 in 61853970.

Let's proceed to step 1:
900 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 900

Moving on to step 2:
The number 900 fits into 61 0 times, leaving a remainder of 61.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 61 to get 61.
Include the next digit (8) from the dividend after 61, then repeat: 618 / 900

Going ahead to step 3:
900 can be fit into 618 0 times, resulting in a remainder of 618.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 618 after subtracting 0 from 618.
Append the next digit (5) from the dividend to 618 and continue with: 6185 / 900

Step 4:
The number 900 fits into 6185 6 times, leaving a remainder of 785.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtracting 5400 from 6185 leaves us with 785.
Append the next digit (3) from the dividend to 785 and continue with: 7853 / 900

On to step 5:
If we divide 7853 by 900, we get 8 and a remainder of 653.
Put 8 as the next digit of the answer. 
Result so far: 68.0
Subtract 7200 from 7853 to get 653.
Include the next digit (9) from the dividend after 653, then repeat: 6539 / 900

Advancing to step 6:
6539 divided by 900 is 7 with a remainder of 239.
The next digit of our result is 7. 
Result so far: 687.0
If we take 6300 away from 6539, we end up with 239.
Include the next digit (7) from the dividend after 239, then repeat: 2397 / 900

Let's proceed to step 7:
The number 900 fits into 2397 2 times, leaving a remainder of 597.
Use 2 as the next digit of our solution. 
Result so far: 6872.0
Deduct 1800 from 2397 and we're left with 597.
Fetch the next digit (0) from the dividend, attach it to 597 and continue: 5970 / 900

Step 8:
900 goes into 5970 6 times with a remainder of 570.
The next digit of our result is 6. 
Result so far: 68726.0
The remainder is 570 after subtracting 5400 from 5970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Let's proceed to step 9:
If we divide 5700 by 900, we get 6 and a remainder of 300.
Use 6 as the next digit of our solution. 
Result so far: 68726.6
Deduct 5400 from 5700 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Moving on to step 10:
900 can be fit into 3000 3 times, resulting in a remainder of 300.
The number 3 becomes the next digit in our result. 
Result so far: 68726.63
Subtracting 2700 from 3000 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Moving on to step 11:
The number 900 fits into 3000 3 times, leaving a remainder of 300.
Record the quotient 3 as the next digit in the result. 
Result so far: 68726.633
Deduct 2700 from 3000 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final outcome is 68726.633, with a leftover of 0.03.