We look at the division of 358669 by 86 
The aim is to understand the frequency of 86 in 358669.

Going ahead to step 1:
3 divided by 86 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 86

Advancing to step 2:
When dividing 35 by 86, we get 0 with a remainder of 35.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 35, we end up with 35.
Fetch the next digit (8) from the dividend, attach it to 35 and continue: 358 / 86

Step 3:
When dividing 358 by 86, we get 4 with a remainder of 14.
The next digit of our result is 4. 
Result so far: 4.0
Subtracting 344 from 358 leaves us with 14.
Append the next digit (6) from the dividend to 14 and continue with: 146 / 86

On to step 4:
146 divided by 86 is 1 with a remainder of 60.
The number 1 becomes the next digit in our result. 
Result so far: 41.0
If we take 86 away from 146, we end up with 60.
Take the next digit (6) from the dividend and append it to 60, then repeat: 606 / 86

Advancing to step 5:
When dividing 606 by 86, we get 7 with a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 417.0
If we subtract 602 from 606, we get 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 86

Advancing to step 6:
86 goes into 49 0 times with a remainder of 49.
Write down 0 as next digit of the result. 
Result so far: 4170.0
If we take 0 away from 49, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 7:
86 goes into 490 5 times with a remainder of 60.
The next digit of our result is 5. 
Result so far: 4170.5
Subtracting 430 from 490 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 8:
The number 86 fits into 600 6 times, leaving a remainder of 84.
Use 6 as the next digit of our solution. 
Result so far: 4170.56
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 9:
If we divide 840 by 86, we get 9 and a remainder of 66.
The next digit of our result is 9. 
Result so far: 4170.569
The remainder is 66 after subtracting 774 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 10:
When dividing 660 by 86, we get 7 with a remainder of 58.
The next digit of our result is 7. 
Result so far: 4170.5697
Subtracting 602 from 660 leaves us 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.

Let's proceed to step 11:
If we divide 580 by 86, we get 6 and a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 4170.56976
If we take 516 away from 580, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 12:
The number 86 fits into 640 7 times, leaving a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 4170.569767
Deduct 602 from 640 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 13:
86 goes into 380 4 times with a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 4170.5697674
The remainder is 36 after subtracting 344 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 14:
360 divided by 86 is 4 with a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 4170.56976744
Subtracting 344 from 360 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The quotient of the division is 4170.56976744, and the remainder is 1.6e-08.