We look at the division of 50871308 by 215 
The aim is to understand the frequency of 215 in 50871308.

Let's proceed to step 1:
5 divided by 215 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 215

Step 2:
When dividing 50 by 215, we get 0 with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 50 and we're left with 50.
Include the next digit (8) from the dividend after 50, then repeat: 508 / 215

On to step 3:
The number 215 fits into 508 2 times, leaving a remainder of 78.
The next digit of our result is 2. 
Result so far: 2.0
If we take 430 away from 508, we end up with 78.
Append the next digit (7) from the dividend to 78 and continue with: 787 / 215

Going ahead to step 4:
When dividing 787 by 215, we get 3 with a remainder of 142.
Put 3 as the next digit of the answer. 
Result so far: 23.0
If we take 645 away from 787, we end up with 142.
Grab the next digit (1) from the dividend, add it to 142, then carry on: 1421 / 215

Advancing to step 5:
When dividing 1421 by 215, we get 6 with a remainder of 131.
The next digit of our result is 6. 
Result so far: 236.0
Deduct 1290 from 1421 and we're left with 131.
Grab the next digit (3) from the dividend, add it to 131, then carry on: 1313 / 215

Moving on to step 6:
The number 215 fits into 1313 6 times, leaving a remainder of 23.
The next digit of our result is 6. 
Result so far: 2366.0
If we subtract 1290 from 1313, we get 23.
Take the next digit (0) from the dividend and append it to 23, then repeat: 230 / 215

Step 7:
215 goes into 230 1 times with a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 23661.0
If we take 215 away from 230, we end up with 15.
Grab the next digit (8) from the dividend, add it to 15, then carry on: 158 / 215

Advancing to step 8:
The number 215 fits into 158 0 times, leaving a remainder of 158.
The number 0 becomes the next digit in our result. 
Result so far: 236610.0
If we subtract 0 from 158, we get 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

On to step 9:
1580 divided by 215 is 7 with a remainder of 75.
Use 7 as the next digit of our solution. 
Result so far: 236610.7
Subtracting 1505 from 1580 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Advancing to step 10:
215 can be fit into 750 3 times, resulting in a remainder of 105.
Put 3 as the next digit of the answer. 
Result so far: 236610.73
The remainder is 105 after subtracting 645 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

On to step 11:
1050 divided by 215 is 4 with a remainder of 190.
Use 4 as the next digit of our solution. 
Result so far: 236610.734
Deduct 860 from 1050 and we're left with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

On to step 12:
The number 215 fits into 1900 8 times, leaving a remainder of 180.
The number 8 becomes the next digit in our result. 
Result so far: 236610.7348
If we subtract 1720 from 1900, we get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Going ahead to step 13:
If we divide 1800 by 215, we get 8 and a remainder of 80.
Use 8 as the next digit of our solution. 
Result so far: 236610.73488
If we subtract 1720 from 1800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final outcome is 236610.73488, with a leftover of 8e-05.