3460184 ÷ 391 
The aim is to understand the frequency of 391 in 3460184.

Going ahead to step 1:
391 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 391

Step 2:
391 goes into 34 0 times with a remainder of 34.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 34, we get 34.
Append the next digit (6) from the dividend to 34 and continue with: 346 / 391

Going ahead to step 3:
The number 391 fits into 346 0 times, leaving a remainder of 346.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 346 leaves us with 346.
Bring next digit (0) of the dividend behind the 346 and repeat the process: 3460 / 391

Moving on to step 4:
3460 divided by 391 is 8 with a remainder of 332.
The next digit of our result is 8. 
Result so far: 8.0
If we subtract 3128 from 3460, we get 332.
Append the next digit (1) from the dividend to 332 and continue with: 3321 / 391

Moving on to step 5:
391 can be fit into 3321 8 times, resulting in a remainder of 193.
Use 8 as the next digit of our solution. 
Result so far: 88.0
The remainder is 193 after subtracting 3128 from 3321.
Bring next digit (8) of the dividend behind the 193 and repeat the process: 1938 / 391

Step 6:
When dividing 1938 by 391, we get 4 with a remainder of 374.
Record the quotient 4 as the next digit in the result. 
Result so far: 884.0
Subtract 1564 from 1938 to get 374.
Bring next digit (4) of the dividend behind the 374 and repeat the process: 3744 / 391

On to step 7:
The number 391 fits into 3744 9 times, leaving a remainder of 225.
Write down 9 as next digit of the result. 
Result so far: 8849.0
Deduct 3519 from 3744 and we're left with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Let's proceed to step 8:
The number 391 fits into 2250 5 times, leaving a remainder of 295.
Write down 5 as next digit of the result. 
Result so far: 8849.5
Deduct 1955 from 2250 and we're left with 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Let's proceed to step 9:
391 can be fit into 2950 7 times, resulting in a remainder of 213.
Record the quotient 7 as the next digit in the result. 
Result so far: 8849.57
If we take 2737 away from 2950, we end up with 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

Going ahead to step 10:
391 can be fit into 2130 5 times, resulting in a remainder of 175.
The number 5 becomes the next digit in our result. 
Result so far: 8849.575
Deduct 1955 from 2130 and we're left with 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

On to step 11:
The number 391 fits into 1750 4 times, leaving a remainder of 186.
Write down 4 as next digit of the result. 
Result so far: 8849.5754
The remainder is 186 after subtracting 1564 from 1750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Going ahead to step 12:
When dividing 1860 by 391, we get 4 with a remainder of 296.
The next digit of our result is 4. 
Result so far: 8849.57544
If we take 1564 away from 1860, we end up with 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

The final outcome is 8849.57544, with a leftover of 0.000296.