89267719 divided by 521 
The aim is to understand the frequency of 521 in 89267719.

Advancing to step 1:
521 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (9) from the dividend to 8 and continue with: 89 / 521

Step 2:
89 divided by 521 is 0 with a remainder of 89.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 89, we end up with 89.
Fetch the next digit (2) from the dividend, attach it to 89 and continue: 892 / 521

Let's proceed to step 3:
521 can be fit into 892 1 times, resulting in a remainder of 371.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 521 away from 892, we end up with 371.
Bring next digit (6) of the dividend behind the 371 and repeat the process: 3716 / 521

Advancing to step 4:
If we divide 3716 by 521, we get 7 and a remainder of 69.
Use 7 as the next digit of our solution. 
Result so far: 17.0
If we take 3647 away from 3716, we end up with 69.
Grab the next digit (7) from the dividend, add it to 69, then carry on: 697 / 521

On to step 5:
If we divide 697 by 521, we get 1 and a remainder of 176.
Write down 1 as next digit of the result. 
Result so far: 171.0
Deduct 521 from 697 and we're left with 176.
Include the next digit (7) from the dividend after 176, then repeat: 1767 / 521

Advancing to step 6:
1767 divided by 521 is 3 with a remainder of 204.
Use 3 as the next digit of our solution. 
Result so far: 1713.0
The remainder is 204 after subtracting 1563 from 1767.
Take the next digit (1) from the dividend and append it to 204, then repeat: 2041 / 521

Moving on to step 7:
If we divide 2041 by 521, we get 3 and a remainder of 478.
The number 3 becomes the next digit in our result. 
Result so far: 17133.0
If we take 1563 away from 2041, we end up with 478.
Include the next digit (9) from the dividend after 478, then repeat: 4789 / 521

Advancing to step 8:
521 can be fit into 4789 9 times, resulting in a remainder of 100.
The number 9 becomes the next digit in our result. 
Result so far: 171339.0
Deduct 4689 from 4789 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 9:
If we divide 1000 by 521, we get 1 and a remainder of 479.
Use 1 as the next digit of our solution. 
Result so far: 171339.1
If we take 521 away from 1000, we end up with 479.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4790, and continue the process.

Step 10:
If we divide 4790 by 521, we get 9 and a remainder of 101.
The number 9 becomes the next digit in our result. 
Result so far: 171339.19
Subtracting 4689 from 4790 leaves us with 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Let's proceed to step 11:
521 can be fit into 1010 1 times, resulting in a remainder of 489.
Put 1 as the next digit of the answer. 
Result so far: 171339.191
If we subtract 521 from 1010, we get 489.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4890, and continue the process.

Let's proceed to step 12:
521 can be fit into 4890 9 times, resulting in a remainder of 201.
Write down 9 as next digit of the result. 
Result so far: 171339.1919
Deduct 4689 from 4890 and we're left with 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Let's proceed to step 13:
When dividing 2010 by 521, we get 3 with a remainder of 447.
The next digit of our result is 3. 
Result so far: 171339.19193
If we subtract 1563 from 2010, we get 447.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4470, and continue the process.

Step 14:
If we divide 4470 by 521, we get 8 and a remainder of 302.
Use 8 as the next digit of our solution. 
Result so far: 171339.191938
The remainder is 302 after subtracting 4168 from 4470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

Step 15:
521 can be fit into 3020 5 times, resulting in a remainder of 415.
Write down 5 as next digit of the result. 
Result so far: 171339.1919385
The remainder is 415 after subtracting 2605 from 3020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

Moving on to step 16:
When dividing 4150 by 521, we get 7 with a remainder of 503.
Put 7 as the next digit of the answer. 
Result so far: 171339.19193857
If we take 3647 away from 4150, we end up with 503.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5030, and continue the process.

The final outcome is 171339.19193857, with a leftover of 5.03e-07.