We look at the division of 86072943 by 738 
The aim is to understand the frequency of 738 in 86072943.

On to step 1:
If we divide 8 by 738, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 738

Advancing to step 2:
86 divided by 738 is 0 with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Include the next digit (0) from the dividend after 86, then repeat: 860 / 738

Step 3:
When dividing 860 by 738, we get 1 with a remainder of 122.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 738 away from 860, we end up with 122.
Fetch the next digit (7) from the dividend, attach it to 122 and continue: 1227 / 738

Going ahead to step 4:
If we divide 1227 by 738, we get 1 and a remainder of 489.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we subtract 738 from 1227, we get 489.
Fetch the next digit (2) from the dividend, attach it to 489 and continue: 4892 / 738

Moving on to step 5:
When dividing 4892 by 738, we get 6 with a remainder of 464.
Record the quotient 6 as the next digit in the result. 
Result so far: 116.0
If we subtract 4428 from 4892, we get 464.
Append the next digit (9) from the dividend to 464 and continue with: 4649 / 738

Advancing to step 6:
When dividing 4649 by 738, we get 6 with a remainder of 221.
Write down 6 as next digit of the result. 
Result so far: 1166.0
Deduct 4428 from 4649 and we're left with 221.
Take the next digit (4) from the dividend and append it to 221, then repeat: 2214 / 738

On to step 7:
If we divide 2214 by 738, we get 3 and a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 11663.0
Subtract 2214 from 2214 to get 0.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 738

Let's proceed to step 8:
If we divide 3 by 738, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 116630.0
Subtracting 0 from 3 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 9:
If we divide 30 by 738, we get 0 and a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 116630.0
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 10:
If we divide 300 by 738, we get 0 and a remainder of 300.
Record the quotient 0 as the next digit in the result. 
Result so far: 116630.0
The remainder is 300 after subtracting 0 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Our division results in 116630.0 with a remaining 0.3.