We look at the division of 68357748 by 258 
The aim is to understand the frequency of 258 in 68357748.

On to step 1:
The number 258 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 258

Step 2:
The number 258 fits into 68 0 times, leaving a remainder of 68.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 68 leaves us with 68.
Take the next digit (3) from the dividend and append it to 68, then repeat: 683 / 258

Going ahead to step 3:
If we divide 683 by 258, we get 2 and a remainder of 167.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 516 from 683 to get 167.
Fetch the next digit (5) from the dividend, attach it to 167 and continue: 1675 / 258

Step 4:
When dividing 1675 by 258, we get 6 with a remainder of 127.
Write down 6 as next digit of the result. 
Result so far: 26.0
If we take 1548 away from 1675, we end up with 127.
Include the next digit (7) from the dividend after 127, then repeat: 1277 / 258

On to step 5:
When dividing 1277 by 258, we get 4 with a remainder of 245.
The number 4 becomes the next digit in our result. 
Result so far: 264.0
If we take 1032 away from 1277, we end up with 245.
Append the next digit (7) from the dividend to 245 and continue with: 2457 / 258

Moving on to step 6:
The number 258 fits into 2457 9 times, leaving a remainder of 135.
The number 9 becomes the next digit in our result. 
Result so far: 2649.0
If we subtract 2322 from 2457, we get 135.
Grab the next digit (4) from the dividend, add it to 135, then carry on: 1354 / 258

Moving on to step 7:
1354 divided by 258 is 5 with a remainder of 64.
Use 5 as the next digit of our solution. 
Result so far: 26495.0
Deduct 1290 from 1354 and we're left with 64.
Fetch the next digit (8) from the dividend, attach it to 64 and continue: 648 / 258

Step 8:
258 can be fit into 648 2 times, resulting in a remainder of 132.
The number 2 becomes the next digit in our result. 
Result so far: 264952.0
Subtracting 516 from 648 leaves us with 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Going ahead to step 9:
258 can be fit into 1320 5 times, resulting in a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 264952.5
If we take 1290 away from 1320, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 10:
When dividing 300 by 258, we get 1 with a remainder of 42.
Write down 1 as next digit of the result. 
Result so far: 264952.51
Subtracting 258 from 300 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 11:
420 divided by 258 is 1 with a remainder of 162.
The next digit of our result is 1. 
Result so far: 264952.511
Subtract 258 from 420 to get 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

The final outcome is 264952.511, with a leftover of 0.0162.