We're dividing 75129219 by 263 
The aim is to understand the frequency of 263 in 75129219.

Let's proceed to step 1:
If we divide 7 by 263, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 263

Step 2:
263 can be fit into 75 0 times, resulting in a remainder of 75.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 75 and we're left with 75.
Bring next digit (1) of the dividend behind the 75 and repeat the process: 751 / 263

Advancing to step 3:
If we divide 751 by 263, we get 2 and a remainder of 225.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 526 from 751 to get 225.
Grab the next digit (2) from the dividend, add it to 225, then carry on: 2252 / 263

Step 4:
263 can be fit into 2252 8 times, resulting in a remainder of 148.
Put 8 as the next digit of the answer. 
Result so far: 28.0
The remainder is 148 after subtracting 2104 from 2252.
Append the next digit (9) from the dividend to 148 and continue with: 1489 / 263

Let's proceed to step 5:
When dividing 1489 by 263, we get 5 with a remainder of 174.
Use 5 as the next digit of our solution. 
Result so far: 285.0
Deduct 1315 from 1489 and we're left with 174.
Take the next digit (2) from the dividend and append it to 174, then repeat: 1742 / 263

Moving on to step 6:
263 goes into 1742 6 times with a remainder of 164.
The next digit of our result is 6. 
Result so far: 2856.0
Subtract 1578 from 1742 to get 164.
Include the next digit (1) from the dividend after 164, then repeat: 1641 / 263

Going ahead to step 7:
If we divide 1641 by 263, we get 6 and a remainder of 63.
Write down 6 as next digit of the result. 
Result so far: 28566.0
The remainder is 63 after subtracting 1578 from 1641.
Bring next digit (9) of the dividend behind the 63 and repeat the process: 639 / 263

Advancing to step 8:
639 divided by 263 is 2 with a remainder of 113.
The number 2 becomes the next digit in our result. 
Result so far: 285662.0
Subtract 526 from 639 to get 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

Step 9:
If we divide 1130 by 263, we get 4 and a remainder of 78.
Record the quotient 4 as the next digit in the result. 
Result so far: 285662.4
If we subtract 1052 from 1130, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 10:
780 divided by 263 is 2 with a remainder of 254.
Put 2 as the next digit of the answer. 
Result so far: 285662.42
If we take 526 away from 780, we end up with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Moving on to step 11:
When dividing 2540 by 263, we get 9 with a remainder of 173.
Record the quotient 9 as the next digit in the result. 
Result so far: 285662.429
The remainder is 173 after subtracting 2367 from 2540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

Going ahead to step 12:
1730 divided by 263 is 6 with a remainder of 152.
Write down 6 as next digit of the result. 
Result so far: 285662.4296
Deduct 1578 from 1730 and we're left with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Advancing to step 13:
If we divide 1520 by 263, we get 5 and a remainder of 205.
The next digit of our result is 5. 
Result so far: 285662.42965
If we take 1315 away from 1520, we end up with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

On to step 14:
If we divide 2050 by 263, we get 7 and a remainder of 209.
Use 7 as the next digit of our solution. 
Result so far: 285662.429657
The remainder is 209 after subtracting 1841 from 2050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

On to step 15:
263 goes into 2090 7 times with a remainder of 249.
Use 7 as the next digit of our solution. 
Result so far: 285662.4296577
Deduct 1841 from 2090 and we're left with 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

After the division, we end up with 285662.4296577 and a remainder of 2.49e-06.