We look at the division of 51170020 by 131 
The aim is to understand the frequency of 131 in 51170020.

Step 1:
131 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 131

Moving on to step 2:
When dividing 51 by 131, we get 0 with a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Bring next digit (1) of the dividend behind the 51 and repeat the process: 511 / 131

On to step 3:
The number 131 fits into 511 3 times, leaving a remainder of 118.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 393 away from 511, we end up with 118.
Append the next digit (7) from the dividend to 118 and continue with: 1187 / 131

Let's proceed to step 4:
The number 131 fits into 1187 9 times, leaving a remainder of 8.
The next digit of our result is 9. 
Result so far: 39.0
Subtracting 1179 from 1187 leaves us with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 131

Advancing to step 5:
80 divided by 131 is 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 390.0
Subtract 0 from 80 to get 80.
Bring next digit (0) of the dividend behind the 80 and repeat the process: 800 / 131

Advancing to step 6:
131 can be fit into 800 6 times, resulting in a remainder of 14.
The next digit of our result is 6. 
Result so far: 3906.0
The remainder is 14 after subtracting 786 from 800.
Grab the next digit (2) from the dividend, add it to 14, then carry on: 142 / 131

Let's proceed to step 7:
The number 131 fits into 142 1 times, leaving a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 39061.0
If we subtract 131 from 142, we get 11.
Bring next digit (0) of the dividend behind the 11 and repeat the process: 110 / 131

Advancing to step 8:
The number 131 fits into 110 0 times, leaving a remainder of 110.
Record the quotient 0 as the next digit in the result. 
Result so far: 390610.0
Deduct 0 from 110 and we're left with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Moving on to step 9:
If we divide 1100 by 131, we get 8 and a remainder of 52.
The next digit of our result is 8. 
Result so far: 390610.8
The remainder is 52 after subtracting 1048 from 1100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 10:
If we divide 520 by 131, we get 3 and a remainder of 127.
Record the quotient 3 as the next digit in the result. 
Result so far: 390610.83
If we take 393 away from 520, we end up with 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Let's proceed to step 11:
131 goes into 1270 9 times with a remainder of 91.
Write down 9 as next digit of the result. 
Result so far: 390610.839
If we subtract 1179 from 1270, we get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Step 12:
If we divide 910 by 131, we get 6 and a remainder of 124.
Record the quotient 6 as the next digit in the result. 
Result so far: 390610.8396
If we take 786 away from 910, we end up with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Going ahead to step 13:
131 can be fit into 1240 9 times, resulting in a remainder of 61.
Record the quotient 9 as the next digit in the result. 
Result so far: 390610.83969
Subtracting 1179 from 1240 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 14:
When dividing 610 by 131, we get 4 with a remainder of 86.
Put 4 as the next digit of the answer. 
Result so far: 390610.839694
If we subtract 524 from 610, we get 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

On to step 15:
The number 131 fits into 860 6 times, leaving a remainder of 74.
The next digit of our result is 6. 
Result so far: 390610.8396946
If we subtract 786 from 860, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 16:
The number 131 fits into 740 5 times, leaving a remainder of 85.
The next digit of our result is 5. 
Result so far: 390610.83969465
The remainder is 85 after subtracting 655 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

In conclusion, the division gives 390610.83969465 with a balance of 8.5e-08.