53357859 divided by 40 
The aim is to understand the frequency of 40 in 53357859.

Advancing to step 1:
If we divide 5 by 40, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 40

Advancing to step 2:
The number 40 fits into 53 1 times, leaving a remainder of 13.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 40 from 53, we get 13.
Bring next digit (3) of the dividend behind the 13 and repeat the process: 133 / 40

Going ahead to step 3:
40 goes into 133 3 times with a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 13.0
The remainder is 13 after subtracting 120 from 133.
Fetch the next digit (5) from the dividend, attach it to 13 and continue: 135 / 40

On to step 4:
40 can be fit into 135 3 times, resulting in a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 133.0
The remainder is 15 after subtracting 120 from 135.
Take the next digit (7) from the dividend and append it to 15, then repeat: 157 / 40

Let's proceed to step 5:
If we divide 157 by 40, we get 3 and a remainder of 37.
Record the quotient 3 as the next digit in the result. 
Result so far: 1333.0
If we subtract 120 from 157, we get 37.
Bring next digit (8) of the dividend behind the 37 and repeat the process: 378 / 40

Moving on to step 6:
40 can be fit into 378 9 times, resulting in a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 13339.0
If we subtract 360 from 378, we get 18.
Append the next digit (5) from the dividend to 18 and continue with: 185 / 40

On to step 7:
185 divided by 40 is 4 with a remainder of 25.
Record the quotient 4 as the next digit in the result. 
Result so far: 133394.0
The remainder is 25 after subtracting 160 from 185.
Include the next digit (9) from the dividend after 25, then repeat: 259 / 40

Going ahead to step 8:
40 goes into 259 6 times with a remainder of 19.
Record the quotient 6 as the next digit in the result. 
Result so far: 1333946.0
If we subtract 240 from 259, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 9:
The number 40 fits into 190 4 times, leaving a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 1333946.4
Subtract 160 from 190 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 10:
40 goes into 300 7 times with a remainder of 20.
Write down 7 as next digit of the result. 
Result so far: 1333946.47
Subtracting 280 from 300 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 11:
40 goes into 200 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 1333946.475
If we take 200 away from 200, we end up 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.

Going ahead to step 12:
0 divided by 40 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1333946.475
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 13:
0 divided by 40 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1333946.475
Subtracting 0 from 0 leaves us 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.

After the division, we end up with 1333946.475 and a remainder of 0.0.