We look at the division of 33064487 by 391 
The aim is to understand the frequency of 391 in 33064487.

On to step 1:
3 divided by 391 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 391

Let's proceed to step 2:
391 can be fit into 33 0 times, resulting in a remainder of 33.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 33 to get 33.
Fetch the next digit (0) from the dividend, attach it to 33 and continue: 330 / 391

Let's proceed to step 3:
330 divided by 391 is 0 with a remainder of 330.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 330 to get 330.
Append the next digit (6) from the dividend to 330 and continue with: 3306 / 391

Advancing to step 4:
When dividing 3306 by 391, we get 8 with a remainder of 178.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtracting 3128 from 3306 leaves us with 178.
Include the next digit (4) from the dividend after 178, then repeat: 1784 / 391

Advancing to step 5:
391 can be fit into 1784 4 times, resulting in a remainder of 220.
The next digit of our result is 4. 
Result so far: 84.0
Deduct 1564 from 1784 and we're left with 220.
Grab the next digit (4) from the dividend, add it to 220, then carry on: 2204 / 391

Step 6:
2204 divided by 391 is 5 with a remainder of 249.
The number 5 becomes the next digit in our result. 
Result so far: 845.0
Subtract 1955 from 2204 to get 249.
Append the next digit (8) from the dividend to 249 and continue with: 2498 / 391

Let's proceed to step 7:
2498 divided by 391 is 6 with a remainder of 152.
Write down 6 as next digit of the result. 
Result so far: 8456.0
If we subtract 2346 from 2498, we get 152.
Fetch the next digit (7) from the dividend, attach it to 152 and continue: 1527 / 391

Going ahead to step 8:
When dividing 1527 by 391, we get 3 with a remainder of 354.
Use 3 as the next digit of our solution. 
Result so far: 84563.0
Subtract 1173 from 1527 to get 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Step 9:
391 can be fit into 3540 9 times, resulting in a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 84563.9
If we subtract 3519 from 3540, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 10:
The number 391 fits into 210 0 times, leaving a remainder of 210.
Use 0 as the next digit of our solution. 
Result so far: 84563.9
Subtracting 0 from 210 leaves us with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

On to step 11:
The number 391 fits into 2100 5 times, leaving a remainder of 145.
Record the quotient 5 as the next digit in the result. 
Result so far: 84563.905
If we take 1955 away from 2100, we end up with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Going ahead to step 12:
391 can be fit into 1450 3 times, resulting in a remainder of 277.
Put 3 as the next digit of the answer. 
Result so far: 84563.9053
If we subtract 1173 from 1450, we get 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

On to step 13:
The number 391 fits into 2770 7 times, leaving a remainder of 33.
The next digit of our result is 7. 
Result so far: 84563.90537
Subtract 2737 from 2770 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 14:
391 can be fit into 330 0 times, resulting in a remainder of 330.
Use 0 as the next digit of our solution. 
Result so far: 84563.90537
Subtracting 0 from 330 leaves us with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Going ahead to step 15:
If we divide 3300 by 391, we get 8 and a remainder of 172.
Put 8 as the next digit of the answer. 
Result so far: 84563.9053708
Subtract 3128 from 3300 to get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

On to step 16:
The number 391 fits into 1720 4 times, leaving a remainder of 156.
The next digit of our result is 4. 
Result so far: 84563.90537084
Subtract 1564 from 1720 to get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

In conclusion, the division gives 84563.90537084 with a balance of 1.56e-07.