We divide 15911039 by 801
The aim is to understand the frequency of 801 in 15911039.

Step 1:
If we divide 1 by 801, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 801

Step 2:
801 can be fit into 15 0 times, resulting in a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 801

Let's proceed to step 3:
The number 801 fits into 159 0 times, leaving a remainder of 159.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 159 after subtracting 0 from 159.
Bring next digit (1) of the dividend behind the 159 and repeat the process: 1591 / 801

Going ahead to step 4:
801 goes into 1591 1 times with a remainder of 790.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 801 from 1591, we get 790.
Fetch the next digit (1) from the dividend, attach it to 790 and continue: 7901 / 801

On to step 5:
When dividing 7901 by 801, we get 9 with a remainder of 692.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtract 7209 from 7901 to get 692.
Include the next digit (0) from the dividend after 692, then repeat: 6920 / 801

On to step 6:
801 goes into 6920 8 times with a remainder of 512.
Use 8 as the next digit of our solution. 
Result so far: 198.0
Subtracting 6408 from 6920 leaves us with 512.
Bring next digit (3) of the dividend behind the 512 and repeat the process: 5123 / 801

Moving on to step 7:
801 can be fit into 5123 6 times, resulting in a remainder of 317.
Record the quotient 6 as the next digit in the result. 
Result so far: 1986.0
Subtracting 4806 from 5123 leaves us with 317.
Include the next digit (9) from the dividend after 317, then repeat: 3179 / 801

Let's proceed to step 8:
When dividing 3179 by 801, we get 3 with a remainder of 776.
Put 3 as the next digit of the answer. 
Result so far: 19863.0
Subtracting 2403 from 3179 leaves us with 776.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7760, and continue the process.

Advancing to step 9:
801 can be fit into 7760 9 times, resulting in a remainder of 551.
The next digit of our result is 9. 
Result so far: 19863.9
Deduct 7209 from 7760 and we're left with 551.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5510, and continue the process.

Advancing to step 10:
801 goes into 5510 6 times with a remainder of 704.
The number 6 becomes the next digit in our result. 
Result so far: 19863.96
If we take 4806 away from 5510, we end up with 704.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7040, and continue the process.

Let's proceed to step 11:
801 goes into 7040 8 times with a remainder of 632.
Put 8 as the next digit of the answer. 
Result so far: 19863.968
If we subtract 6408 from 7040, we get 632.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6320, and continue the process.

On to step 12:
801 can be fit into 6320 7 times, resulting in a remainder of 713.
The next digit of our result is 7. 
Result so far: 19863.9687
If we subtract 5607 from 6320, we get 713.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7130, and continue the process.

Going ahead to step 13:
801 goes into 7130 8 times with a remainder of 722.
Record the quotient 8 as the next digit in the result. 
Result so far: 19863.96878
The remainder is 722 after subtracting 6408 from 7130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7220, and continue the process.

Advancing to step 14:
If we divide 7220 by 801, we get 9 and a remainder of 11.
The next digit of our result is 9. 
Result so far: 19863.968789
Subtracting 7209 from 7220 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 15:
When dividing 110 by 801, we get 0 with a remainder of 110.
The number 0 becomes the next digit in our result. 
Result so far: 19863.968789
If we take 0 away from 110, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Going ahead to step 16:
If we divide 1100 by 801, we get 1 and a remainder of 299.
Record the quotient 1 as the next digit in the result. 
Result so far: 19863.96878901
Subtract 801 from 1100 to get 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

After the division, we end up with 19863.96878901 and a remainder of 2.99e-07.