We're dividing 840438 by 53 
The aim is to understand the frequency of 53 in 840438.

Going ahead to step 1:
If we divide 8 by 53, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 53

Advancing to step 2:
53 goes into 84 1 times with a remainder of 31.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 53 from 84 and we're left with 31.
Fetch the next digit (0) from the dividend, attach it to 31 and continue: 310 / 53

Going ahead to step 3:
53 goes into 310 5 times with a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Subtract 265 from 310 to get 45.
Append the next digit (4) from the dividend to 45 and continue with: 454 / 53

Step 4:
53 goes into 454 8 times with a remainder of 30.
Use 8 as the next digit of our solution. 
Result so far: 158.0
Subtract 424 from 454 to get 30.
Bring next digit (3) of the dividend behind the 30 and repeat the process: 303 / 53

Step 5:
If we divide 303 by 53, we get 5 and a remainder of 38.
The number 5 becomes the next digit in our result. 
Result so far: 1585.0
Deduct 265 from 303 and we're left with 38.
Take the next digit (8) from the dividend and append it to 38, then repeat: 388 / 53

Advancing to step 6:
If we divide 388 by 53, we get 7 and a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 15857.0
Subtracting 371 from 388 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 7:
53 goes into 170 3 times with a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 15857.3
Deduct 159 from 170 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 8:
53 can be fit into 110 2 times, resulting in a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 15857.32
If we subtract 106 from 110, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
If we divide 40 by 53, we get 0 and a remainder of 40.
The next digit of our result is 0. 
Result so far: 15857.32
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
53 goes into 400 7 times with a remainder of 29.
Record the quotient 7 as the next digit in the result. 
Result so far: 15857.3207
Subtracting 371 from 400 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 11:
53 goes into 290 5 times with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 15857.32075
Subtracting 265 from 290 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 12:
53 can be fit into 250 4 times, resulting in a remainder of 38.
The next digit of our result is 4. 
Result so far: 15857.320754
Deduct 212 from 250 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 13:
If we divide 380 by 53, we get 7 and a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 15857.3207547
If we take 371 away from 380, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 14:
90 divided by 53 is 1 with a remainder of 37.
Record the quotient 1 as the next digit in the result. 
Result so far: 15857.32075471
If we subtract 53 from 90, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

The quotient of the division is 15857.32075471, and the remainder is 3.7e-08.