3942419 ÷ 806 
The aim is to understand the frequency of 806 in 3942419.

Moving on to step 1:
When dividing 3 by 806, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 806

Step 2:
The number 806 fits into 39 0 times, leaving a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Take the next digit (4) from the dividend and append it to 39, then repeat: 394 / 806

Going ahead to step 3:
If we divide 394 by 806, we get 0 and a remainder of 394.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 394, we end up with 394.
Take the next digit (2) from the dividend and append it to 394, then repeat: 3942 / 806

Let's proceed to step 4:
3942 divided by 806 is 4 with a remainder of 718.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 3224 from 3942, we get 718.
Include the next digit (4) from the dividend after 718, then repeat: 7184 / 806

Step 5:
The number 806 fits into 7184 8 times, leaving a remainder of 736.
Put 8 as the next digit of the answer. 
Result so far: 48.0
Subtract 6448 from 7184 to get 736.
Grab the next digit (1) from the dividend, add it to 736, then carry on: 7361 / 806

Let's proceed to step 6:
7361 divided by 806 is 9 with a remainder of 107.
Record the quotient 9 as the next digit in the result. 
Result so far: 489.0
Subtracting 7254 from 7361 leaves us with 107.
Fetch the next digit (9) from the dividend, attach it to 107 and continue: 1079 / 806

Step 7:
The number 806 fits into 1079 1 times, leaving a remainder of 273.
The next digit of our result is 1. 
Result so far: 4891.0
The remainder is 273 after subtracting 806 from 1079.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2730, and continue the process.

Let's proceed to step 8:
The number 806 fits into 2730 3 times, leaving a remainder of 312.
The number 3 becomes the next digit in our result. 
Result so far: 4891.3
If we take 2418 away from 2730, we end up with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Moving on to step 9:
806 goes into 3120 3 times with a remainder of 702.
The number 3 becomes the next digit in our result. 
Result so far: 4891.33
If we subtract 2418 from 3120, we get 702.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7020, and continue the process.

The final result is 4891.33 with a remainder of 0.702.