We're dividing 121916 by 86 
The aim is to understand the frequency of 86 in 121916.

Advancing to step 1:
86 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 86

Going ahead to step 2:
86 goes into 12 0 times with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 86

Moving on to step 3:
If we divide 121 by 86, we get 1 and a remainder of 35.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 86 from 121, we get 35.
Append the next digit (9) from the dividend to 35 and continue with: 359 / 86

Step 4:
86 goes into 359 4 times with a remainder of 15.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtracting 344 from 359 leaves us with 15.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 86

Advancing to step 5:
86 goes into 151 1 times with a remainder of 65.
The number 1 becomes the next digit in our result. 
Result so far: 141.0
The remainder is 65 after subtracting 86 from 151.
Bring next digit (6) of the dividend behind the 65 and repeat the process: 656 / 86

Advancing to step 6:
When dividing 656 by 86, we get 7 with a remainder of 54.
Write down 7 as next digit of the result. 
Result so far: 1417.0
The remainder is 54 after subtracting 602 from 656.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 7:
86 goes into 540 6 times with a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 1417.6
Subtracting 516 from 540 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 8:
86 can be fit into 240 2 times, resulting in a remainder of 68.
Record the quotient 2 as the next digit in the result. 
Result so far: 1417.62
If we take 172 away from 240, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 9:
86 can be fit into 680 7 times, resulting in a remainder of 78.
The number 7 becomes the next digit in our result. 
Result so far: 1417.627
Deduct 602 from 680 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Let's proceed to step 10:
If we divide 780 by 86, we get 9 and a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 1417.6279
If we take 774 away from 780, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 11:
86 goes into 60 0 times with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 1417.6279
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 12:
When dividing 600 by 86, we get 6 with a remainder of 84.
Record the quotient 6 as the next digit in the result. 
Result so far: 1417.627906
Subtract 516 from 600 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Going ahead to step 13:
86 goes into 840 9 times with a remainder of 66.
The number 9 becomes the next digit in our result. 
Result so far: 1417.6279069
Subtracting 774 from 840 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 14:
86 goes into 660 7 times with a remainder of 58.
The number 7 becomes the next digit in our result. 
Result so far: 1417.62790697
If we take 602 away from 660, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

The final outcome is 1417.62790697, with a leftover of 5.8e-08.