Let's divide 16010934 by 391
The aim is to understand the frequency of 391 in 16010934.

Moving on to step 1:
If we divide 1 by 391, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 391

Let's proceed to step 2:
391 goes into 16 0 times with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Grab the next digit (0) from the dividend, add it to 16, then carry on: 160 / 391

Let's proceed to step 3:
391 can be fit into 160 0 times, resulting in a remainder of 160.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 160 and we're left with 160.
Include the next digit (1) from the dividend after 160, then repeat: 1601 / 391

Going ahead to step 4:
1601 divided by 391 is 4 with a remainder of 37.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 1564 from 1601, we get 37.
Include the next digit (0) from the dividend after 37, then repeat: 370 / 391

Step 5:
391 can be fit into 370 0 times, resulting in a remainder of 370.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
Subtract 0 from 370 to get 370.
Fetch the next digit (9) from the dividend, attach it to 370 and continue: 3709 / 391

Advancing to step 6:
When dividing 3709 by 391, we get 9 with a remainder of 190.
Use 9 as the next digit of our solution. 
Result so far: 409.0
If we take 3519 away from 3709, we end up with 190.
Bring next digit (3) of the dividend behind the 190 and repeat the process: 1903 / 391

Advancing to step 7:
1903 divided by 391 is 4 with a remainder of 339.
Record the quotient 4 as the next digit in the result. 
Result so far: 4094.0
Subtracting 1564 from 1903 leaves us with 339.
Append the next digit (4) from the dividend to 339 and continue with: 3394 / 391

Advancing to step 8:
The number 391 fits into 3394 8 times, leaving a remainder of 266.
Put 8 as the next digit of the answer. 
Result so far: 40948.0
If we take 3128 away from 3394, we end up with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Step 9:
2660 divided by 391 is 6 with a remainder of 314.
Use 6 as the next digit of our solution. 
Result so far: 40948.6
The remainder is 314 after subtracting 2346 from 2660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Advancing to step 10:
If we divide 3140 by 391, we get 8 and a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 40948.68
If we take 3128 away from 3140, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 11:
391 can be fit into 120 0 times, resulting in a remainder of 120.
Use 0 as the next digit of our solution. 
Result so far: 40948.68
The remainder is 120 after subtracting 0 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 12:
391 goes into 1200 3 times with a remainder of 27.
Write down 3 as next digit of the result. 
Result so far: 40948.6803
Subtract 1173 from 1200 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 13:
270 divided by 391 is 0 with a remainder of 270.
Record the quotient 0 as the next digit in the result. 
Result so far: 40948.6803
Subtracting 0 from 270 leaves us with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

On to step 14:
2700 divided by 391 is 6 with a remainder of 354.
Write down 6 as next digit of the result. 
Result so far: 40948.680306
Subtracting 2346 from 2700 leaves us with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

On to step 15:
3540 divided by 391 is 9 with a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 40948.6803069
The remainder is 21 after subtracting 3519 from 3540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 16:
391 can be fit into 210 0 times, resulting in a remainder of 210.
Put 0 as the next digit of the answer. 
Result so far: 40948.6803069
The remainder is 210 after subtracting 0 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Our division results in 40948.6803069 with a remaining 2.1e-07.