53405541 ÷ 120 
The aim is to understand the frequency of 120 in 53405541.

Step 1:
The number 120 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 120

Advancing to step 2:
The number 120 fits into 53 0 times, leaving a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 53 to get 53.
Grab the next digit (4) from the dividend, add it to 53, then carry on: 534 / 120

Let's proceed to step 3:
120 can be fit into 534 4 times, resulting in a remainder of 54.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 480 from 534, we get 54.
Grab the next digit (0) from the dividend, add it to 54, then carry on: 540 / 120

Let's proceed to step 4:
540 divided by 120 is 4 with a remainder of 60.
The number 4 becomes the next digit in our result. 
Result so far: 44.0
If we subtract 480 from 540, we get 60.
Bring next digit (5) of the dividend behind the 60 and repeat the process: 605 / 120

Step 5:
605 divided by 120 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 445.0
The remainder is 5 after subtracting 600 from 605.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 120

Moving on to step 6:
When dividing 55 by 120, we get 0 with a remainder of 55.
The next digit of our result is 0. 
Result so far: 4450.0
If we subtract 0 from 55, we get 55.
Append the next digit (4) from the dividend to 55 and continue with: 554 / 120

On to step 7:
120 goes into 554 4 times with a remainder of 74.
Put 4 as the next digit of the answer. 
Result so far: 44504.0
Subtract 480 from 554 to get 74.
Include the next digit (1) from the dividend after 74, then repeat: 741 / 120

Advancing to step 8:
120 goes into 741 6 times with a remainder of 21.
The number 6 becomes the next digit in our result. 
Result so far: 445046.0
Subtracting 720 from 741 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 9:
When dividing 210 by 120, we get 1 with a remainder of 90.
The next digit of our result is 1. 
Result so far: 445046.1
The remainder is 90 after subtracting 120 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Step 10:
120 can be fit into 900 7 times, resulting in a remainder of 60.
The number 7 becomes the next digit in our result. 
Result so far: 445046.17
Subtract 840 from 900 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 11:
If we divide 600 by 120, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 445046.175
The remainder is 0 after subtracting 600 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 12:
When dividing 0 by 120, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 445046.175
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 13:
If we divide 0 by 120, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 445046.175
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 445046.175 with a remainder of 0.0.