We're dividing 53406271 by 145 
The aim is to understand the frequency of 145 in 53406271.

Step 1:
If we divide 5 by 145, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 145

Let's proceed to step 2:
145 can be fit into 53 0 times, resulting in a remainder of 53.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Grab the next digit (4) from the dividend, add it to 53, then carry on: 534 / 145

Advancing to step 3:
145 goes into 534 3 times with a remainder of 99.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 435 from 534 and we're left with 99.
Fetch the next digit (0) from the dividend, attach it to 99 and continue: 990 / 145

Going ahead to step 4:
The number 145 fits into 990 6 times, leaving a remainder of 120.
The next digit of our result is 6. 
Result so far: 36.0
Subtract 870 from 990 to get 120.
Append the next digit (6) from the dividend to 120 and continue with: 1206 / 145

Going ahead to step 5:
145 can be fit into 1206 8 times, resulting in a remainder of 46.
Record the quotient 8 as the next digit in the result. 
Result so far: 368.0
Deduct 1160 from 1206 and we're left with 46.
Append the next digit (2) from the dividend to 46 and continue with: 462 / 145

Let's proceed to step 6:
When dividing 462 by 145, we get 3 with a remainder of 27.
The next digit of our result is 3. 
Result so far: 3683.0
Subtracting 435 from 462 leaves us with 27.
Append the next digit (7) from the dividend to 27 and continue with: 277 / 145

Step 7:
If we divide 277 by 145, we get 1 and a remainder of 132.
Write down 1 as next digit of the result. 
Result so far: 36831.0
Deduct 145 from 277 and we're left with 132.
Take the next digit (1) from the dividend and append it to 132, then repeat: 1321 / 145

Advancing to step 8:
When dividing 1321 by 145, we get 9 with a remainder of 16.
Write down 9 as next digit of the result. 
Result so far: 368319.0
Subtract 1305 from 1321 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 9:
145 can be fit into 160 1 times, resulting in a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 368319.1
Subtract 145 from 160 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 10:
150 divided by 145 is 1 with a remainder of 5.
Put 1 as the next digit of the answer. 
Result so far: 368319.11
Subtracting 145 from 150 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final result is 368319.11 with a remainder of 0.005.