375188 divided by 13 
The aim is to understand the frequency of 13 in 375188.

On to step 1:
3 divided by 13 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 13

Going ahead to step 2:
13 goes into 37 2 times with a remainder of 11.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 26 from 37 and we're left with 11.
Include the next digit (5) from the dividend after 11, then repeat: 115 / 13

Step 3:
13 goes into 115 8 times with a remainder of 11.
Write down 8 as next digit of the result. 
Result so far: 28.0
Deduct 104 from 115 and we're left with 11.
Take the next digit (1) from the dividend and append it to 11, then repeat: 111 / 13

On to step 4:
If we divide 111 by 13, we get 8 and a remainder of 7.
Write down 8 as next digit of the result. 
Result so far: 288.0
If we take 104 away from 111, we end up with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 13

On to step 5:
13 goes into 78 6 times with a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 2886.0
Subtract 78 from 78 to get 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 13

On to step 6:
13 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 28860.0
If we take 0 away from 8, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 7:
13 can be fit into 80 6 times, resulting in a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 28860.6
Subtract 78 from 80 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 8:
13 goes into 20 1 times with a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 28860.61
Deduct 13 from 20 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 9:
13 goes into 70 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 28860.615
If we take 65 away from 70, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 10:
When dividing 50 by 13, we get 3 with a remainder of 11.
Use 3 as the next digit of our solution. 
Result so far: 28860.6153
Subtract 39 from 50 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 11:
If we divide 110 by 13, we get 8 and a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 28860.61538
The remainder is 6 after subtracting 104 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 12:
13 can be fit into 60 4 times, resulting in a remainder of 8.
The next digit of our result is 4. 
Result so far: 28860.615384
Deduct 52 from 60 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 13:
If we divide 80 by 13, we get 6 and a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 28860.6153846
Deduct 78 from 80 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 14:
13 goes into 20 1 times with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 28860.61538461
The remainder is 7 after subtracting 13 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final outcome is 28860.61538461, with a leftover of 7e-09.