20511713 ÷ 875 
The aim is to understand the frequency of 875 in 20511713.

Moving on to step 1:
When dividing 2 by 875, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 875

Going ahead to step 2:
When dividing 20 by 875, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 20, we end up with 20.
Take the next digit (5) from the dividend and append it to 20, then repeat: 205 / 875

Advancing to step 3:
875 can be fit into 205 0 times, resulting in a remainder of 205.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 205 leaves us with 205.
Bring next digit (1) of the dividend behind the 205 and repeat the process: 2051 / 875

Step 4:
When dividing 2051 by 875, we get 2 with a remainder of 301.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 1750 from 2051 and we're left with 301.
Include the next digit (1) from the dividend after 301, then repeat: 3011 / 875

Let's proceed to step 5:
When dividing 3011 by 875, we get 3 with a remainder of 386.
Use 3 as the next digit of our solution. 
Result so far: 23.0
Deduct 2625 from 3011 and we're left with 386.
Append the next digit (7) from the dividend to 386 and continue with: 3867 / 875

Step 6:
3867 divided by 875 is 4 with a remainder of 367.
The number 4 becomes the next digit in our result. 
Result so far: 234.0
If we subtract 3500 from 3867, we get 367.
Include the next digit (1) from the dividend after 367, then repeat: 3671 / 875

Step 7:
The number 875 fits into 3671 4 times, leaving a remainder of 171.
The number 4 becomes the next digit in our result. 
Result so far: 2344.0
If we subtract 3500 from 3671, we get 171.
Append the next digit (3) from the dividend to 171 and continue with: 1713 / 875

Moving on to step 8:
If we divide 1713 by 875, we get 1 and a remainder of 838.
Record the quotient 1 as the next digit in the result. 
Result so far: 23441.0
The remainder is 838 after subtracting 875 from 1713.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8380, and continue the process.

Step 9:
When dividing 8380 by 875, we get 9 with a remainder of 505.
Write down 9 as next digit of the result. 
Result so far: 23441.9
If we subtract 7875 from 8380, we get 505.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5050, and continue the process.

Advancing to step 10:
The number 875 fits into 5050 5 times, leaving a remainder of 675.
The number 5 becomes the next digit in our result. 
Result so far: 23441.95
If we take 4375 away from 5050, we end up with 675.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6750, and continue the process.

Step 11:
If we divide 6750 by 875, we get 7 and a remainder of 625.
Use 7 as the next digit of our solution. 
Result so far: 23441.957
Deduct 6125 from 6750 and we're left with 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Let's proceed to step 12:
875 can be fit into 6250 7 times, resulting in a remainder of 125.
The next digit of our result is 7. 
Result so far: 23441.9577
Deduct 6125 from 6250 and we're left with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Our division results in 23441.9577 with a remaining 0.00125.