We look at the division of 787166 by 53 
The aim is to understand the frequency of 53 in 787166.

Step 1:
When dividing 7 by 53, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 53

Step 2:
If we divide 78 by 53, we get 1 and a remainder of 25.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 53 from 78 leaves us with 25.
Fetch the next digit (7) from the dividend, attach it to 25 and continue: 257 / 53

Going ahead to step 3:
257 divided by 53 is 4 with a remainder of 45.
Write down 4 as next digit of the result. 
Result so far: 14.0
Subtracting 212 from 257 leaves us with 45.
Fetch the next digit (1) from the dividend, attach it to 45 and continue: 451 / 53

Moving on to step 4:
When dividing 451 by 53, we get 8 with a remainder of 27.
Use 8 as the next digit of our solution. 
Result so far: 148.0
The remainder is 27 after subtracting 424 from 451.
Fetch the next digit (6) from the dividend, attach it to 27 and continue: 276 / 53

Going ahead to step 5:
276 divided by 53 is 5 with a remainder of 11.
Record the quotient 5 as the next digit in the result. 
Result so far: 1485.0
If we subtract 265 from 276, we get 11.
Take the next digit (6) from the dividend and append it to 11, then repeat: 116 / 53

Advancing to step 6:
116 divided by 53 is 2 with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 14852.0
The remainder is 10 after subtracting 106 from 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 7:
The number 53 fits into 100 1 times, leaving a remainder of 47.
Use 1 as the next digit of our solution. 
Result so far: 14852.1
Subtracting 53 from 100 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 8:
When dividing 470 by 53, we get 8 with a remainder of 46.
The next digit of our result is 8. 
Result so far: 14852.18
If we take 424 away from 470, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 9:
53 can be fit into 460 8 times, resulting in a remainder of 36.
Record the quotient 8 as the next digit in the result. 
Result so far: 14852.188
The remainder is 36 after subtracting 424 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final outcome is 14852.188, with a leftover of 0.0036.